2016 United States Senate election in Alabama, Republican primary
If Shelby had decided to retire, numerous high-profile Alabama Republicans were speculated to run, including U.S. Representatives Robert Aderholt, Mo Brooks, Bradley Byrne, Gary Palmer, Martha Roby, and Mike Rogers, State Treasurer Young Boozer, State Speaker Mike Hubbard, Lieutenant Governor Kay Ivey, State Senate President Pro Tempore Del Marsh, Secretary of State John Merrill, U.S. Appeals Court Judge William H. Pryor Jr., former Governor Bob Riley, and Attorney General Luther Strange. Shelby announced in January 2015 that he would run for re-election.


2016 United States Senate election in Alaska
The 2016 United States Senate election in Alaska was held on November 8, 2016, to elect a member of the United States Senate to represent the State of Alaska, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Alaska
Incumbent Republican Senator Lisa Murkowski won re-election to a third term in office. The primaries were held on August 16. She was challenged by several candidates, including Democrat Ray Metcalfe, a former Republican state legislator; Independent Margaret Stock, an attorney; and Libertarian Joe Miller, who had defeated Murkowski for the Republican nomination six years before.


2016 United States Senate election in Alaska
Murkowski was re-elected with 44.4% of the vote, becoming the first person in history to win three elections to the U.S. Senate with pluralities but not majorities, having taken 48.6% in 2004 and 39.5% in 2010. Miller's 29.2% finish was then the best ever for a Libertarian candidate in a U.S. Senate election in terms of vote percentage. This record was surpassed four years later by Ricky Dale Harrington Jr., who received 33.4% of the vote in the 2020 Senate election in Arkansas, which had no Democratic candidate.


2016 United States Senate election in Alaska, Background
After Republican U.S. Senator Frank Murkowski was elected Governor of Alaska in 2002, he appointed his daughter Lisa to the Senate to replace him. She was elected to a full term in 2004 but was defeated in the Republican primary in 2010 by Tea Party challenger Joe Miller. She ran as a write-in candidate in the general election and was re-elected to a second full term with 39.5% of the vote to Miller's 35.5% and Democratic nominee Scott McAdams' 23.5%. She is one of only two U.S. Senators to be elected via write-in votes, the other being Strom Thurmond in 1954.


2016 United States Senate election in Alaska, Republican primary
As Murkowski was defeated in the Republican primary in 2010, it had been speculated that she would be challenged from the right again in 2016.


2016 United States Senate election in Alaska, Democratic–Libertarian–Independence primary
Candidates from the Alaska Democratic Party, Alaska Libertarian Party and Alaskan Independence Party appear on the same ballot, with the highest-placed candidate from each party receiving that party's nomination.


2016 United States Senate election in Alaska, Democratic–Libertarian–Independence primary, Subsequent events
Cean Stevens was originally the only Libertarian to file, and was the sole Libertarian in the primary. Stevens withdrew after winning the nomination, and the Alaska Libertarian Party nominated Joe Miller as her replacement.


2016 United States Senate election in Arizona
The 2016 United States Senate election in Arizona was held on November 8, 2016, to elect a member of the U.S. Senate to represent the State of Arizona, concurrently with the 2016 U.S. presidential election, other elections to the U.S. Senate in other states and elections to the U.S. House of Representatives, as well as various state and local elections.


2016 United States Senate election in Arizona
The Democratic primary was held on March 22, 2016, while the Republican primary election took place on August 30, 2016. After serving in the Arizona State Legislature and U.S. House of Representatives for a number of years, Democrat Ann Kirkpatrick sought to unseat incumbent Republican Senator John McCain, who won re-election to his sixth and final term in office.


2016 United States Senate election in Arizona
After hinting in September 2013 that he could retire, McCain subsequently said that the chances he would run again were "pretty good", but his campaign had emphasized that he had not made a decision yet. On April 7, 2015, McCain announced that he would run for re-election. McCain faced strong primary opposition from the Tea Party, but he managed to defeat challenger Kelli Ward in the August 30 primary.


2016 United States Senate election in Arizona
McCain won with 53.7% of the vote compared to Kirkpatrick's 40.8%, with 5.5% voting for the Green candidate Gary Swing. Although McCain won reelection by double digits, this was the closest margin of his Senate career. As of 2021, this is the last time a Republican won the election for a U.S. Senate seat in Arizona. Kirkpatrick would later successfully ran again for the U.S. House of Representatives in Arizona's 2nd congressional district in 2018.


2016 United States Senate election in Arizona
On August 25, 2018, Senator McCain died of brain cancer, leading Governor Doug Ducey to appoint former U.S. Senator Jon Kyl to fill the seat. However, this action was taken with the understanding that Kyl would only serve until the end of the year. U.S. Representative Martha McSally, who was selected as Kyl's replacement starting 2019, ran in the 2020 special election to fill out the remainder of the term, but was defeated by Democrat Mark Kelly.


2016 United States Senate election in Arizona, Republican primary
John McCain, the 2008 Republican presidential nominee, was re-elected to a fifth term with 59.3% of the vote in 2010. In September 2013 he hinted that he may retire, saying that "[President Obama's] in his last term, I'm probably in mine." When asked if that meant he wouldn't run for re-election, he said "I don't know. I was trying to make a point. I have to decide in about two years so I don't have to make a decision [now]. I don't want to be one of these old guys that should've shoved off."


2016 United States Senate election in Arizona, Republican primary
He then said in October 2013 that he was "seriously thinking" about running for re-election. By April 2014 he had held his first fundraiser and acknowledged that "elements on the right" would like to primary him, which he said was "fine with me... you know me: a fight not joined is a fight not enjoyed... I know that I will be very well-prepared." Jennifer Duffy of The Cook Political Report noted that McCain did not fit the profile of a "complacent, long-serving incumbent", saying: "It's not an easy thing to take him on. He is going to be well-prepared, and he has a well-earned reputation for running really tough campaigns. He raises a lot of money and he puts together a good organization."


2016 United States Senate election in Arizona, Republican primary
In September 2014, McCain began having "serious conversations" with state Republicans, local officials and key supporters about running for re-election. He faced a primary challenge in 2010 from former Congressman J. D. Hayworth, who some felt was the weaker opponent. McCain massively outspent and easily defeated him. However, he could face a stronger challenger in 2016. A survey by Public Policy Polling in March 2014 found that McCain was the most unpopular Senator in the country, with 30% of Arizonans approving of him to 54% who disapproved.


2016 United States Senate election in Arizona, Republican primary
His unpopularity was bipartisan, with his approvals at 35%–55% with Republicans, 29%–53% with Democrats and 25%–55% with independents. An April 2014 survey by The Polling Company for Citizens United Political Victory Fund found that 64.2% of Republican primary voters favored "a new person" to 29.3% who thought that "Senator McCain deserves to be re-elected to another six-year term." It also found him trailing in match-ups with a generic primary opponent and against specific opponents (see below).


2016 United States Senate election in Arizona, Republican primary
Further compounding matters for McCain was his relationship with the Arizona Republican Party. After his re-election in 2010, McCain adopted more orthodox conservative stances and attitudes and largely opposed actions of the Obama administration. By 2013, however, he had become a key figure in the Senate for negotiating deals on certain issues in an otherwise partisan environment. By early 2014, McCain's apostasies were enough that the Arizona Republican Party formally censured him for having what they saw as a liberal record that had been "disastrous and harmful".


2016 United States Senate election in Arizona, Republican primary
The action had no practical effect but showed that McCain's history of being criticized at the state level as insufficiently conservative was still ongoing. Tea Party leaders have said that they are "sick to death" of McCain and will oppose him if he seeks re-election, with one prominent critic of McCain saying that Arizona conservatives were preparing for a "civil war". However, McCain still had a large warchest – $1.7 million as of June 2014 – and would be helped by Arizona state law, which allows independents to vote in the Republican primary.


2016 United States Senate election in Arizona, Republican primary
By early October 2014, McCain was telling reporters that the odds of his running for re-election were "pretty good", saying that whether or not Republicans retake control of the Senate in the 2014 elections would be a factor in his decision-making, "but it certainly wouldn't be the deciding factor." In late October, it was revealed that McCain had scheduled a meeting with supporters two days after the 2014 midterm elections to "discuss my thoughts on my own re-election in 2016." At that meeting, following the Republican takeover of the Senate, he said that he was "seriously considering" and "leaning towards" running for re-election and will make an announcement in early 2015.


2016 United States Senate election in Arizona, Republican primary
In December 2014, Politico reported that McCain and his allies were waging an "aggressive and systematic campaign" to purge the Arizona Republican Party's apparatus of Tea Party and far-right conservatives who hold "obscure, but influential, local party offices" and replace them with McCain loyalists. The Super PAC "Arizona Grassroots Action" was created, which raised almost $300,000 and supported McCain-allied candidates with mailers and automated phone calls, bringing attention to what were previously low-profile and uncontested races.


2016 United States Senate election in Arizona, Republican primary
Before August 26, when elections for party offices were held, almost all of the 3,925 precinct committeemen (who vote for local party chairmen, who in turn make decisions on how the party will spend state and local funds, which candidates receive endorsements or funding etc.) were opposed to McCain. After the elections, 1,531 (39%) were regarded as supportive of McCain. Most notably, Timothy Schwartz, who authored the resolution which censured McCain, was ousted. Schwartz attacked McCain for using his "prominence and money and influence" to "ramrod" his critics and former Maricopa County Republican Party Chairman A.J. LaFaro said that McCain was "vindictive" and engaging in the equivalent of "ethnic cleansing".


2016 United States Senate election in Arizona, Republican primary
Tea Party Congressmen Matt Salmon and David Schweikert had been widely regarded as two of the most serious potential challengers to McCain. The pair, who are close friends, agreed that if one of them decided to run against McCain, the other would not do so, to ensure that the anti-McCain vote wouldn't be split between them.


2016 United States Senate election in Arizona, Republican primary
Schweikert has acknowledged that he polled the race in 2014 but was considered the less likely of the two to run – he has much less cash-on-hand than Salmon and has admitted that his wife was "not thrilled" at the idea of him running for the Senate. Salmon has since stated that he will not challenge McCain in the primary.


2016 United States Senate election in Arizona, Republican primary
In early February, McCain said that he was "most likely" running for re-election and Club for Growth President David McIntosh said that the organization would "watch closely" the primary race, particularly if Salmon or Schweikert ran, and would "do research and polling and determine if there's a path to victory [against McCain]." Towards the end of February, Salmon and Schweikert began to distance themselves from the race, with State Senator Kelli Ward revealing that she was considering a run.


2016 United States Senate election in Arizona, Republican primary
McCain officially announced on April 7, 2015, that he was running for re-election.


2016 United States Senate election in Arkansas
The 2016 United States Senate election in Arkansas was held November 8, 2016, to elect a member of the United States Senate to represent the State of Arkansas, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Arkansas
Incumbent Republican Senator John Boozman won re-election to a second term in office, becoming the first Republican senator reelected in the history of the state. Former U.S. Attorney Conner Eldridge was the only Democrat to declare his candidacy. The primaries were held March 1. This is also the first election that the state has simultaneously voted for a Republican Senate candidate and a Republican presidential candidate.


2016 United States Senate election in Arkansas, Third parties
The Libertarian Party of Arkansas held a special nominating convention on October 24, 2015, to select nominees for elections in 2016. Frank Gilbert was selected as the nominee for the U.S. Senate race.


2016 United States Senate election in California
The 2016 United States Senate election in California was held on November 8, 2016, to elect a member of the United States Senate to represent the State of California, concurrently with the 2016 U.S. presidential election, as well as elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in California
Under California's nonpartisan blanket primary law, all candidates appear on the same ballot, regardless of party. In the primary, voters may vote for any candidate, regardless of their party affiliation. In the California system, the top two finishers—regardless of party—advance to the general election in November, even if a candidate receives a majority of the vote in the primary election. Washington and Louisiana have similar "jungle primary" style processes for senators.


2016 United States Senate election in California
Incumbent Democratic Senator Barbara Boxer decided to not run for reelection to a fifth term. This was the first open seat Senate election in California since 1992, when Boxer was first elected. In the primary on June 7, 2016, California Attorney General Kamala Harris and U.S. Representative Loretta Sanchez, both Democrats, finished in first and second place, respectively, and contested the general election. For the first time since direct elections to the Senate began after the passage of the Seventeenth Amendment in 1913, no Republican appeared on the general election ballot for U.S. Senate in California. The highest Republican finisher in the primary won only 7.8 percent of the vote, and the 10 Republicans only won 27.9 percent of the vote among them.


2016 United States Senate election in California
In the general election, Harris defeated Sanchez in a landslide, carrying 54 of the state's 58 counties, including Sanchez's home county of Orange, although Sanchez held Harris to a margin of less than 1% in the Central Valley counties of Kern and Merced.


2016 United States Senate election in California, Background
Barbara Boxer was reelected with 52.1% of the vote in 2010 against Republican Carly Fiorina. Toward the end of 2014, Boxer's low fundraising and cash-on-hand numbers led to speculation that she would retire. On January 8, 2015, she announced that she would not run for reelection.


2016 United States Senate election in California, Primary election, Fundraising
The following are Federal Election Commission disclosures through the reporting period ending March 31, 2016.


2016 United States Senate election in California, General election, Fundraising
The following are Federal Election Commission disclosures through the reporting period ending March 31, 2016.


2016 United States Senate election in California, Miscellaneous
Harris stepped down from her Senate seat on January 18, 2021, two days before her inauguration as Vice President. This makes Harris the first US Senator elected to a full six-year term since Barack Obama in 2008 to not finish what would be her sole term. On December 22, 2020, California Governor Gavin Newsom appointed California Secretary of State Alex Padilla to serve the remainder of Harris' term. Although Harris no longer occupies this Senate seat, she became President of the Senate on January 20, 2021 by virtue of her election as Vice President.


2016 United States Senate election in Colorado
The 2016 United States Senate election in Colorado was held November 8, 2016, to elect a member of the United States Senate to represent the State of Colorado, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Colorado
Major party candidates can qualify for the ballot through party assemblies or by petition. To qualify by assembly, a candidate must receive at least 30 percent of the vote from the party's state assembly. To qualify by petition, the candidate must file at least 1,500 signatures from each congressional district by April 4, 2016.


2016 United States Senate election in Colorado
Incumbent Democratic Senator Michael Bennet won re-election to a second full term in office. Bennet's main challenger was Republican nominee Darryl Glenn, an El Paso County commissioner. Glenn won a crowded, five-way Republican primary in June. Three other candidates were on the ballot: former Eagle County Commissioner Arn Menconi was the Green Party nominee; Lily Tang Williams was the Libertarian Party nominee; and Unity Party of America Chairman Bill Hammons was the Unity Party nominee.


2016 United States Senate election in Colorado, Background
Democratic U.S. Senator Ken Salazar resigned in January 2009 to become United States Secretary of the Interior and Governor Bill Ritter appointed Bennet, the Superintendent of Denver Public Schools, to replace him. Bennet was elected to a full term in 2010, defeating Republican Ken Buck by 48.1% to 46.4%.


2016 United States Senate election in Colorado, Republican primary
The Colorado Republican Party State Assembly was held April 9, 2016. Darryl Glenn won the convention with 70% of the vote. Robert Blaha, Jack Graham, Jon Keyser, and Ryan Frazier sought to qualify for the ballot by petition instead of through the State Assembly.


2016 United States Senate election in Colorado, Republican primary
Glenn won the June primary with about 37.5% of the vote in the crowded, five-candidate Republican primary field.


2016 United States Senate election in Colorado, Republican primary, Candidate controversies
In early May, the Denver ABC affiliate uncovered over 10 forged voter signatures on the petition which placed Republican candidate Jon Keyser on the June Republican primary ballot. The circulator who forged the signatures was arrested for 34 felonies. A late May lawsuit claiming at least 60 forged signatures based on the analysis of a handwriting expert and challenging Keyser's placement on the primary ballot was dismissed because it didn't fall within the five-day window to challenge a ballot placement.


2016 United States Senate election in Colorado, Republican primary, Candidate controversies
When asked on-camera about the forgeries, Keyser didn't address the issue and proceeded to inform the interviewer that Keyser's dog was larger than the interviewer.


2016 United States Senate election in Colorado, Republican primary, Candidate controversies
In early June, when asked by a fellow Republican candidate and a retired air force lieutenant colonel whether Keyser received his Bronze Star for work on a software program or for "kicking in doors" in combat as "represented to the community", Keyser refused to answer the question and claimed he had "no idea" what software program his rival was talking about. Yet, according to the article announcing Keyser's citation, Keyser "developed and implemented a unique and effective technique to provide critical force protection and situational-awareness data to ground counter-terrorism operations."


2016 United States Senate election in Colorado, Republican primary, Candidate controversies
In August 2014, Republican candidate Jack Graham was fired as Colorado State University Athletic Director for reasons that were not specified, though he would continue to be paid through the November 2016 election.


2016 United States Senate election in Colorado, Republican primary, Results
Darryl Glenn won the general primary on June 28 and went on to face the other candidates in the November election.


2016 United States Senate election in Connecticut
The 2016 United States Senate election in Connecticut was held November 8, 2016, to elect a member of the United States Senate to represent the State of Connecticut, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Connecticut
Incumbent Democratic Senator Richard Blumenthal won re-election to a second term in office. Blumenthal's final vote total of 1,008,714 at the time made him the largest vote-receiver in the history of statewide elections in the state (Blumenthal’s record was later broken by then Vice President Joe Biden in the 2020 Presidential election, Biden received 1,080,680 votes ). He also became the first person ever to exceed 1 million votes in the history of statewide elections in Connecticut. He remains the highest voter-receiver in the history statewide elections besides the presidency.


2016 United States Senate election in Connecticut, Republican candidates, Republican convention
The Republican state convention was held May 9, 2016, at the Connecticut Convention Center to select candidates for the U.S. Senate and U.S. House of Representatives. State Representative Dan Carter received the nomination with 76.7% of the delegate vote. Neither Jack Orchulli nor August Wolf received the necessary 15% of the delegate vote necessary to be granted an automatic primary on August 9, 2016. In the first round of voting, August Wolf received 179 delegate votes, equalling 15.1% and qualifying for a primary. However, before balloting closed, Jack Orchulli dropped from the race and publicly endorsed Dan Carter, urging his candidates to switch their votes. During the vote switching, an additional 56 delegates that had voted for Wolf also switched their vote, dropping him well below the 15% threshold


2016 United States Senate election in Connecticut, Republican candidates, Republican convention
On May 11, 2016, Wolf announced an attempt to force a primary by collecting the signatures of 8,079 registered Republicans by June 7. However, on June 21, 2016, it was announced that Wolf failed to reach the required signature threshold to force a primary, and he conceded the Republican nomination to Dan Carter as a result.


2016 United States Senate election in Florida
The 2016 United States Senate election in Florida was held November 8, 2016 to elect a member of the United States Senate to represent the State of Florida, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primary elections for both the Republicans and Democrats took place on August 30, 2016.


2016 United States Senate election in Florida
Incumbent Republican Senator Marco Rubio ran for another term but faced well-funded Republican primary opposition after initially announcing he would not seek re-election to his Senate seat. He had openly considered whether to seek re-election or run for president in 2016. He stated in April 2014 that he would not run for both the Senate and president in 2016, as Florida law prohibits a candidate from simultaneously appearing twice on a ballot, but did not rule out running for either office.


2016 United States Senate election in Florida
However, in April 2015, Rubio announced that he was running for President and would not seek re-election. Rubio had initially said he would not run for re-election to the Senate even if he dropped out of the GOP presidential primary before he would have to qualify for the 2016 Senate primary ballot, for which the filing deadline was June 24, 2016.


2016 United States Senate election in Florida
On June 13, 2016, despite his previous statements that he would not run for re-election to his Senate seat, Rubio "seemed to open the door to running for re-election," citing the previous day's mass shooting in Orlando and how "it really gives you pause, to think a little bit about your service to your country and where you can be most useful to your country." On June 22, 2016, Rubio announced that he would seek re-election to the Senate, reversing his pledge not to run.


2016 United States Senate election in Florida
On August 30, the Republican Party nominated Marco Rubio, and the Democratic Party nominated Representative Patrick Murphy. Rubio won with the largest raw vote total in Florida history (until Donald Trump broke the record in 2020), taking a greater percentage of the popular vote than Republican presidential nominee Donald Trump, who won the state in the election. He is the first Republican Senator from Florida since 1994, and only the second with Connie Mack, to be reelected to a second term. Also, with Mel Martinez's victory in 2004, this marks the first time that Republicans have won one of Florida's Senate seats three times in a row (Mack succeeded Lawton Chiles, a Democrat, and was succeeded by another Democrat, Bill Nelson).


2016 United States Senate election in Florida
Marco Rubio won 48% of the Hispanic vote and 17% of the African American vote during this election, an exceptional number for a Republican during a presidential year.


2016 United States Senate election in Florida, Libertarian primary
On October 1, 2015, Adrian Wyllie and Lynn House, chair and vice chair, respectively, of the Libertarian Party of Florida, resigned their seats in protest after the executive committee refused to oust candidate Augustus Invictus from the party. According to Wyllie, Invictus had defended eugenics, called for a new Civil War, and brutally slaughtered a goat, and is not representative of the Libertarian Party. Invictus has refuted these claims, calling Wyllie's accusations, "deliberate misrepresentation[s]."


2016 United States Senate election in Georgia
The 2016 United States Senate election in Georgia was held November 8, 2016, to elect a member of the United States Senate to represent the State of Georgia, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primary election for the Republican and Democratic parties took place on May 24, 2016.


2016 United States Senate election in Georgia
Incumbent Republican Senator Johnny Isakson won re-election to a third term in office by a wide margin. Isakson resigned from the Senate on December 31, 2019 due to health issues. This is the last time as of 2021 that suburban Gwinnett and Henry counties have voted for a Republican in a statewide election, and is the most recent time that Republicans have won a Senate race in Georgia.


2016 United States Senate election in Georgia, Libertarian nomination, Candidates, Declared
Allen Buckley won the nomination at the March 5, 2016, nominating convention in Marietta


2016 United States Senate election in Hawaii
The 2016 United States Senate election in Hawaii was held November 8, 2016, concurrently with the 2016 U.S. presidential election as well as other elections to the United States Senate and House of Representatives and various state and local elections. The primaries were held August 13. Incumbent Democratic U.S. Senator Brian Schatz won reelection to his first full term in office, defeating former state legislator John Carroll.


2016 United States Senate election in Hawaii, Background
In 2011, Daniel Inouye announced that he planned to run for a record tenth term in 2016, when he would have been 92 years old. He also said, "I have told my staff and I have told my family that when the time comes, when you question my sanity or question my ability to do things physically or mentally, I don't want you to hesitate, do everything to get me out of here, because I want to make certain the people of Hawaii get the best representation possible."


2016 United States Senate election in Hawaii, Background
Inouye died on December 17, 2012. Hawaii Governor Neil Abercrombie appointed Lieutenant Governor Brian Schatz, a Democrat, to succeed Inouye. Schatz won a 2014 special election to serve the remainder of Inouye's term.


2016 United States Senate election in Idaho
The 2016 United States Senate election in Idaho was held November 8, 2016, to elect a member of the United States Senate to represent the State of Idaho, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held May 17.


2016 United States Senate election in Idaho
Incumbent Republican Senator Mike Crapo won re-election to a fourth term in office.


2016 United States Senate election in Illinois
The 2016 United States Senate election in Illinois was held on November 8, 2016, to elect a member of the United States Senate to represent the State of Illinois, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Illinois
Party primary elections in Illinois were held March 15, 2016. Incumbent Republican U.S. Senator Mark Kirk ran for re-election to a second full term, but was defeated by Democratic nominee Tammy Duckworth, the U.S. representative from Illinois's 8th congressional district and a decorated combat veteran of the Iraq War.


2016 United States Senate election in Illinois, Election information
The primaries and general elections coincided with those for United States President and House, as well as those for state offices.


2016 United States Senate election in Illinois, Election information, Background
In 2010, Republican Mark Kirk was elected to the Senate  for Illinois, defeating Democratic nominee Alexi Giannoulias by 59,220 votes out of more than 3.7 million votes cast.


2016 United States Senate election in Illinois, Election information, Background
Kirk suffered a severe stroke in January 2012 that kept him away from the Senate until January 2013. In June 2013 he confirmed that he was "planning" to run for re-election, but there was speculation that he might retire, particularly in the wake of the departure of several of his senior staff. Republican Bruce Rauner was elected Governor in 2014, and a possible scenario was that Kirk would resign early, allowing Rauner to appoint another Republican as the replacement.


2016 United States Senate election in Illinois, Election information, Background
Potential replacements  included U.S. Representatives Bob Dold, Adam Kinzinger, Aaron Schock, and Peter Roskam, State Senators Jason Barickman and Christine Radogno, hedge fund manager and founder and CEO of Citadel LLC Kenneth C. Griffin, and businesswoman Beth Christie. In November 2014, Kirk reiterated that he was going to run for re-election.


2016 United States Senate election in Illinois, Election information, Background
Kirk was identified by The Washington Post, The New York Times, Politico, The Huffington Post, Slate and Roll Call as one of the most vulnerable Republican senators up for re-election in 2016.


2016 United States Senate election in Illinois, Election information, Turnout
For the primary election, turnout was 41.94%, with 3,215,334 votes cast. For the general election, turnout was 68.39%, with 5,491,878 votes cast.


2016 United States Senate election in Illinois, Third party candidates
On July 6, the Green Party candidate and the Libertarian Party candidate were announced as having made the ballot for November after no objections were filed against their petitions. However, objections against two others were filed, namely: the Constitution Party candidate Chad Koppie, due to his name being on a petition slate with Constitution Party presidential candidate Darrell Castle who turned in fewer than the required petitions needed, and against Independent candidate Eric Conklin. Neither Koppie nor Conklin are likely to receive ballot access after a review of their petitions.


2016 United States Senate election in Illinois, General election, Campaign
Kirk had multiple factors working against him, as no Republican had won an Illinois US Senate race during a presidential election year since 1972, and he had made a number of gaffes during the campaign. He had exaggerated his Iraq War record on his campaign website, and during a debate, Kirk made a racially charged remark about Duckworth's familial military background. Additionally, Republican presidential nominee Donald Trump was unpopular in Chicago and its suburbs, and Kirk refused to endorse or vote for him, instead writing in former United States Secretary of State Colin Powell.


2016 United States Senate election in Illinois, General election, Campaign
Due to these factors, Kirk alienated the Democratic, Independent, and Republican voters whom he had previously won over in his 2010 campaign. Unusually, the normally Republican-leaning editorial board of the Chicago Tribune endorsed Duckworth, as they believed that the health problems that Kirk had suffered as a result of his stroke made him a less effective Senator. This election had been cited as historic as both major party nominees had physical disabilities.


2016 United States Senate election in Illinois, General election, Results
Democratic U.S. Representative Tammy Duckworth easily defeated the Republican incumbent senator Mark Kirk. Polls showed Kirk would be easily defeated by Duckworth, and the polls were proven right when Duckworth was declared the winner quickly after polls closed in Illinois. Duckworth performed extremely well in the heavily populated and strongly Democratic Cook County, home of Chicago. Duckworth also did well in Champaign, East St. Louis and Carbondale. Kirk did do well in rural parts of the state. The Chicago 'collar counties' — among them Kirk's home county of Lake County — failed to deliver for the incumbent, and they easily went for Duckworth. Duckworth was sworn in at 12:00 P.M. EST on January 3, 2017.


2016 United States Senate election in Illinois, General election, Results
The Libertarian and Green candidates polled well, winning three and two percent of the vote respectively.


2016 United States Senate election in Indiana
The 2016 United States Senate election in Indiana was held on November 8, 2016, to elect a member of the United States Senate to represent the State of Indiana, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Indiana
Incumbent Republican Senator Dan Coats, who had served in the Senate since 2011, and previously from 1989 to 1999, stated that he planned to run for re-election, but in March 2014 his chief of staff said that Coats "has decided not to decide whether to run again until after the [2014] midterm elections". On March 24, 2015, Coats announced that he would not run for re-election, citing that he would be of advanced age (just under 80 years old) by the end of the 2017–2023 term, should he complete it.


2016 United States Senate election in Indiana
The primaries were held May 3, and were won by former U.S. Representative Baron Hill and incumbent U.S. Representative Todd Young. However, on July 11, 2016, Hill withdrew, and former U.S. Senator Evan Bayh entered the race to regain the seat he held from 1999 to 2011, and that his father, Birch Bayh, held from 1963 to 1981. The Indiana Democratic Party chose Bayh as Hill's replacement on July 22. Bayh was initially seen as the frontrunner, but faced heavy criticism over lobbying work that he had done after leaving office as well as his lack of forthrightedness about maintaining residency in the state. Ultimately, Young won by a comfortable margin, defeating Bayh in the general election by 10 points.


2016 United States Senate election in Indiana, Democratic State Central Committee selection
On July 11, 2016, CNN's Tom LoBianco announced that Bayh would enter the race to regain his old Senate seat and Hill would drop out and withdraw his name from the November ballot. Hill soon after released a statement formally dropping out of the race saying he did not "...want to stand in the way of Democrats winning Indiana and the U.S. Senate. That would not be fair to my party or my state. And, the stakes are far too high in this election not to put my country above my own political ambitions," without explicitly endorsing Bayh. The first candidate to declare was Bob Kern, a frequent candidate for Congress in various districts around the state. Bayh officially declared for the race July 13. The Indiana Democratic Party's State Central Committee chose Bayh as Hill's replacement, for the general election.


2016 United States Senate election in Iowa
The 2016 United States Senate election in Iowa was held November 8, 2016, to elect a member of the United States Senate to represent the State of Iowa, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Iowa
Incumbent Republican Senator Chuck Grassley won reelection to a seventh term in office. Primary elections were held June 7, 2016, with Grassley facing no primary opposition, and former Lieutenant Governor Patty Judge winning the Democratic nomination. Grassley won a seventh term in a sixth consecutive landslide and outperformed Donald Trump, who also won the state that year, but the election was his closest after his initial election in 1980. Patty Judge's 36% of the vote was the best performance by a Democratic nominee for Iowa's class 3 senate seat since 1980.


2016 United States Senate election in Iowa, Background
Republican Chuck Grassley was first elected to the Senate in 1980, defeating Democratic incumbent John Culver by 53% to 46%. Since then, Grassley has been re-elected five times, most recently in 2010, on each occasion taking at least 64% of the vote.


2016 United States Senate election in Iowa, Background
Despite speculation that Grassley, who turned 83 years old in 2016, might retire, he announced in September 2013 that he was "making plans to run for re-election", but added that "it's not taking much of my time. I'm concentrating on doing my job for Iowans."


2016 United States Senate election in Kansas
The 2016 United States Senate election in Kansas was held on November 8, 2016, to elect a member of the United States Senate to represent the State of Kansas, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held on August 2.


2016 United States Senate election in Kansas
Incumbent Republican Senator Jerry Moran won re-election to a second term in office.


2016 United States Senate election in Kentucky
The 2016 United States Senate election in Kentucky was held November 8, 2016 to elect a member of the United States Senate to represent the State of Kentucky, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held May 17.


2016 United States Senate election in Kentucky
Incumbent Republican Senator Rand Paul filed for re-election in December 2015, and Mayor Jim Gray of Lexington filed to run against Paul for the Senate in late January 2016. In the general election, Paul defeated Gray by 14.5 points.


2016 United States Senate election in Kentucky, Background
If Paul had become the Republican presidential (or vice-presidential) nominee, state law would have prohibited him from simultaneously running for re-election. In March 2014, the Republican-controlled Kentucky Senate passed a bill that would allow Paul to run for both offices, but the Democratic-controlled Kentucky House of Representatives declined to take it up. Paul spent his own campaign money in the 2014 legislative elections, helping Republican candidates for the State House in the hopes of flipping the chamber, thus allowing the legislature to pass the bill (Democratic Governor Steve Beshear's veto could have been overridden with a simple majority). However, the Democrats retained their 54-46 majority in the State House.


2016 United States Senate election in Kentucky, Background
Paul was running for both president and re-election, and considered several options to get around the law preventing him from appearing twice on the ballot, but he dropped his presidential bid to focus on re-election to the Senate on February 3, 2016. His supporters said the law does not apply to federal offices and suggested changing the May Kentucky presidential primaries to March caucuses would allow Paul to run for re-election and continue to seek the presidential nomination.


2016 United States Senate election in Kentucky, Background
However, this option would have only worked until the presidential primaries were over, as he would still have had to appear on the ballot twice in November if he had won the Republican presidential nomination.


2016 United States Senate election in Kentucky, Background
Other options that were open to him included running for both offices and leaving it to Democratic Secretary of State Alison Lundergan Grimes to remove him from the ballot; attempting to replace Grimes in the 2015 elections with a Republican Secretary of State who would not enforce the law; filing a lawsuit against the law; and running for president in every state except for Kentucky, where he could have run for re-election and hoped to win the presidency without Kentucky's electoral college votes.


2016 United States Senate election in Kentucky, Background
In a letter to Kentucky Republicans in February 2015, Paul asked them to allow him the same option afforded to Wisconsin Congressman Paul Ryan, who ran for re-election at the same time as Vice President on Mitt Romney's ticket.


2016 United States Senate election in Kentucky, Background
David M. Drucker of The Washington Examiner reported in the same month that Kentucky Republican leaders were concerned that Paul's actions could mean that if he wins the Republican presidential nomination and is renominated for the Senate, he could either be disqualified from the Senate ballot and the state party blocked from replacing him, which would hand the seat to the Democrats, or he could be disqualified from the presidential ballot, which would see the Democratic presidential nominee pick up Kentucky's 8 electoral college votes.


2016 United States Senate election in Kentucky, Background
In August 2015, the central committee of the Kentucky Republican Party voted to hold a caucus in 2016, allowing Paul to simultaneously run for re-nomination for his seat and the 2016 Republican presidential nomination. State law would still bar Paul from appearing twice on the ballot in the general election. However, on February 3, 2016, Rand Paul dropped out of the 2016 presidential campaign, allowing him to focus on his reelection bid.


2016 United States Senate election in Louisiana
The 2016 United States Senate election in Louisiana took place on November 8, 2016, to elect a member of the United States Senate to represent the State of Louisiana, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Louisiana
Under Louisiana's "jungle primary" system, all candidates appeared on the same ballot, regardless of party, and voters could vote for any candidate. Since no candidate received a majority of the vote during the primary election, a runoff election was held December 10 between the top two candidates in the primary, Republican John Neely Kennedy and Democrat Foster Campbell. Louisiana is the only state that has a jungle primary system (California and Washington have a similar "top two primary" system).


2016 United States Senate election in Louisiana
Incumbent Republican Senator David Vitter unsuccessfully ran for Governor of Louisiana in the 2015 election, losing to Democrat John Bel Edwards. In his concession speech, Vitter announced that he would not seek re-election.


2016 United States Senate election in Louisiana
In addition to Kennedy and Campbell, four other candidates — Republicans Charles Boustany, John Fleming, and David Duke, and Democrat Caroline Fayard — qualified to participate at a debate at Dillard University, a historically black college, on November 2, 2016.


2016 United States Senate election in Louisiana
On November 8, Kennedy and Campbell finished in first and second respectively and thus advanced to the runoff, which was held December 10. In the runoff, Kennedy won the election with over 60% of the vote.


2016 United States Senate election in Maryland
The 2016 United States Senate election in Maryland took place on November 8, 2016, to elect a member of the United States Senate to represent the State of Maryland, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Maryland
Incumbent Democratic Senator Barbara Mikulski decided to retire after five terms in the Senate. Primary elections were held April 26, 2016, in which Chris Van Hollen and Kathy Szeliga were chosen as the Democratic and Republican party nominees, respectively. In addition, the Green Party chose Margaret Flowers and the Libertarian Party chose Arvin Vohra as their respective nominees.


2016 United States Senate election in Maryland
Van Hollen was heavily favored to win the election. He ultimately won with over 60% of the vote. As typically occurs with the state's elections, most support for the Democratic nominee, Van Hollen, came from the densely populated Baltimore–Washington metropolitan area in central Maryland, while the Republican nominee, Szeliga, did well in the more sparsely populated areas on the Eastern Shore and in Western Maryland, and narrowly won Anne Arundel County, home to the state capital Annapolis, as well as exurban Frederick County.


2016 United States Senate election in Maryland, Background
Mikulski first ran for the U.S. Senate in 1974, losing to Republican incumbent Charles Mathias. Mikulski then served in the U.S. House of Representatives from 1977 to 1987 and was elected to the U.S. Senate in 1986, succeeding the retiring Mathias. She was re-elected by large margins in 1992, 1998, 2004 and 2010.


2016 United States Senate election in Maryland, Background
Shortly after being sworn in for her fifth term in 2011, she succeeded Margaret Chase Smith as the longest-serving female senator in U.S. history and on March 17, 2012, she became the longest-serving female member of Congress in U.S. history, surpassing Congresswoman Edith Nourse Rogers of Massachusetts, who served from 1925 to 1960. On March 2, 2015, Mikulski announced that she would not run for re-election to a sixth term in office.


2016 United States Senate election in Maryland, Background
In August 2013, Abby Livingston of Roll Call had predicted that a potential retirement by Mikulski would create "chaos" and "blow open Maryland's political bottleneck" because "the state's teeming political Democratic Party talent is backed up in lower offices." Among the ten Democrats who ran in the primary, only two had previously been elected to an office.


2016 United States Senate election in Maryland, Democratic primary, Results
Van Hollen won the April 26, 2016 primary in each of Maryland's counties except Prince George's and Charles, where Donna Edwards received more votes. Democratic voters in the city of Baltimore also preferred Edwards.


2016 United States Senate election in Maryland, Republican primary, Results
Szeliga won the April 26, 2016 primary in Baltimore City and each of Maryland's counties except Calvert, St. Mary's, Charles, and Prince George's, in which Chris Chaffee received more votes.


2016 United States Senate election in Maryland, General election, Endorsements
c* Audrey Scott, former chair of the Maryland Republican Party


2016 United States Senate election in Missouri
The 2016 United States Senate election in Missouri was held on November 8, 2016, to elect a member of the United States Senate to represent the State of Missouri. It was held concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states, elections to the United States House of Representatives, and various state and local elections. The primaries were held on August 2.


2016 United States Senate election in Missouri
Incumbent Republican Senator Roy Blunt won re-election to a second term in office, narrowly defeating Missouri Secretary of State Jason Kander. Despite losing, Kander's margin was closer that that of Democratic presidential nominee Hillary Clinton in the concurrent presidential election by 15.7 percentage points in Missouri.


2016 United States Senate election in Missouri, Republican primary
Despite being considered an "establishment" Republican, Blunt did not face serious Tea Party opposition due to his efforts to cultivate relationships with activists in Missouri, his effectiveness at "threading the needle" by keeping conservative and establishment Republicans fairly satisfied, and the open gubernatorial election, which attracted the most attention from Republicans.


2016 United States Senate election in Nevada
The 2016 United States Senate election in Nevada was held November 8, 2016 to elect a member of the United States Senate to represent the State of Nevada, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The state primary election was held June 14, 2016.


2016 United States Senate election in Nevada
Incumbent Democratic Senator Harry Reid, the Senate Minority Leader, initially said he would seek re-election to a sixth term, but announced on March 26, 2015, that he would retire instead.


2016 United States Senate election in Nevada
Democratic former State Attorney General Catherine Cortez Masto defeated Republican U.S. Representative Joe Heck in the general election on November 8, 2016. Heck won sixteen of the state's seventeen counties; however, since Cortez Masto won Clark County, which comprises nearly three-quarters of the state's population, she defeated Heck statewide by almost 27,000 votes.


2016 United States Senate election in Nevada, General election, Results
Cortez Masto won her bid to succeed Harry Reid 47.10-44.67, or by 2.33%, running 0.01% better than Hillary Clinton.


2016 United States Senate election in New Hampshire
The 2016 United States Senate election in New Hampshire was held November 8, 2016, to elect a member of the United States Senate to represent the State of New Hampshire, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primary election to select the candidates who appeared on the general election ballot took place on September 13, 2016.


2016 United States Senate election in New Hampshire
Incumbent Republican Senator Kelly Ayotte ran for re-election to a second term in office and won the primary by a wide margin. The Governor of New Hampshire Maggie Hassan chose not to seek reelection to a third term as governor and instead sought the nomination of the Democratic Party for the Senate. Hassan was unopposed in the Democratic primary and won the general election by 1,017 votes, representing a winning margin of approximately 0.14%. This made the election the closest race of the 2016 Senate election cycle, and also the closest race in a New Hampshire Senate election since the disputed 1974–75 election. In addition, it marked the first Democratic victory for New Hampshire's Class 3 Senate seat since the latter election.


2016 United States Senate election in New Hampshire
Hassan joined fellow former governor and Democrat Jeanne Shaheen in representing New Hampshire in the Senate. Although Hassan's narrow victory would not flip majority control of the Senate during the 115th Congress of 2017 to 2019 or the 116th Congress of 2019 to 2021, it would help give the Democratic Party a narrow majority in the U.S. Senate more than four years later, during the 117th Congress.


2016 United States Senate election in New Hampshire, Republican primary
Ayotte was predicted to face opposition in the primary from a Tea Party candidate. In October 2013, former New Hampshire Republican State Committee Chairman Jack Kimball said: "There is no question in my mind that she will garner a primary challenger". Ultimately, she faced only token opposition.


2016 United States Senate election in New Hampshire, Libertarian convention
On Saturday, January 16, 2016, the Libertarian Party of New Hampshire selected Brian Chabot to be their nominee for the U.S. Senate.


2016 United States Senate election in New Hampshire, General election, Allegations of voting irregularities
In February 2017, President Donald Trump (who had endorsed Ayotte) told a gathering of senators at the White House that fraudulent out-of-state voting had cost him and Ayotte the election in New Hampshire. On September 7, state House speaker Shawn Jasper (who also had endorsed Ayotte) alleged that voter fraud swung the election.


2016 United States Senate election in New Hampshire, General election, Allegations of voting irregularities
He made the allegations based on a report by the New Hampshire House of Representatives saying that of the 6,540 voters who had registered to vote on Election Day, only 1,014 of those voters had obtained a New Hampshire drivers license by August 30 of the following year. The Washington Post was able to quickly contact 3 such voters who said that they were college students and kept the drivers license from their home state.


2016 United States Senate election in New Hampshire, General election, Allegations of voting irregularities
Several investigations by New Hampshire's Ballot Law Commission found no evidence of widespread fraud, and only 4 instances of fraud total in the state for the 2016 elections. Specifically addressing the claim of people being bussed in from out of state to vote, Associate Attorney General Anne Edwards noted that they found no evidence for such claims. When they investigated these claims, they found that the buses were chartered out of state, but the voters on the buses lived in New Hampshire and could legally vote there.


2016 United States Senate election in New York
The 2016 United States Senate election in New York was held November 8, 2016, to elect a member of the United States Senate to represent the State of New York, concurrently with the presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries took place on June 28.


2016 United States Senate election in New York
Incumbent Democratic Senator Chuck Schumer won re-election to a fourth term in office. This was considered by many polling aggregate groups to be one of the safest Democratic seats in the nation for this cycle. The prediction turned out to be correct, with Schumer winning around 71% of the vote and all but 5 of the state's 62 counties: Hamilton, Orleans, Wyoming, Allegany and Steuben.


2016 United States Senate election in New York
As of 2021, this is the last election where Jefferson, Oswego, Delaware, Schoharie, Herkimer, Genesee, Wayne, Livingston, Yates, Schuyler, Chemung, Tioga, Lewis and Chenango counties voted Democratic.


2016 United States Senate election in North Carolina
The 2016 United States Senate election in North Carolina was held November 8, 2016 to elect a member of the United States Senate to represent the State of North Carolina, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. Primary elections were held March 15.


2016 United States Senate election in North Carolina
Incumbent Republican Senator Richard Burr won re-election to a third term in office against Democratic former State Representative Deborah K. Ross and Libertarian Sean Haugh.


2016 United States Senate election in North Carolina, Republican primary
There had been speculation that Burr might retire, but he said in September 2014 that he was "planning" on running and reaffirmed this in January 2015. If Burr had retired, the seat was expected to draw significant interest, with potential Republican candidates including U.S. Representatives George Holding, Mark Meadows, and Robert Pittenger, Labor Commissioner Cherie K. Berry, Lieutenant Governor Dan Forest, Agriculture Commissioner Steve Troxler, State Senator Philip E. Berger, and former Ambassador to Denmark James P. Cain.


2016 United States Senate election in North Dakota
The 2016 United States Senate election in North Dakota was held November 8, 2016, to elect a member of the United States Senate to represent the State of North Dakota, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held June 14.


2016 United States Senate election in North Dakota
Incumbent Republican Senator John Hoeven won re-election to a second term with 78.5% of the vote, the largest margin in the state's history. Hoeven became the first Republican Senator to be re-elected from North Dakota since 1974.


2016 United States Senate election in Ohio
The 2016 United States Senate election in Ohio was held November 8, 2016, to elect a member of the United States Senate to represent the State of Ohio, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The close of registration for electors in the primary election was December 16, 2015, and the primary election took place on March 15, 2016. Incumbent Republican U.S. Senator Rob Portman faced former Democratic Governor Ted Strickland. Green Party nominee Joseph  DeMare was also on the ballot along with two other independent candidates and one officially declared write-in candidate. This would be Rob Portman's final term in office before he retires in 2022.


2016 United States Senate election in Ohio
Initially, the seat was viewed by many to be a potential Democratic pickup, but Portman ultimately won reelection to a second term by a landslide, winning 58.03% of the popular vote. His popular vote total of 3,118,567 is the second largest in the state's history, falling 346,084 votes short of George Voinovich's record of 3,464,651 in his 2004 reelection to his second and final term.


2016 United States Senate election in Ohio, Republican primary
Republican Senator Rob Portman ran for re-election to a second term in office. He considered running for president in 2016, but ruled out running for two offices at the same time, even though Ohio law does allow it. He ultimately declined to run for president. The National Organization for Marriage and other socially conservative groups, unhappy with Portman's public backing for same-sex marriage, pledged to back a primary challenger. Tea Party groups, who heavily backed Portman in 2010, said that they were unlikely to do the same if he runs for re-election.


2016 United States Senate election in Ohio, General election, By congressional district
Portman won 13 of 16 congressional districts, including the 13th, which Hillary Clinton also won in the presidential race.


2016 United States Senate election in Ohio, General election, Analysis
Despite being seen early on as a tight race, Portman began to gain the upper hand as Strickland's campaign was said to be the worst he had ever run. Portman received the endorsements of many labor unions including the Ohio Teamsters and the United Mine Workers Union, both of which usually endorsed Democrats. In the end Portman ended up winning in a landslide, the only region where Strickland outperformed Hillary Clinton was in Appalachia, but his performance there was still disappointing for an area he used to represent in Congress.


2016 United States Senate election in Oklahoma
The 2016 United States Senate election in Oklahoma was held November 8, 2016 to elect a member of the United States Senate to represent the State of Oklahoma, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held June 28.


2016 United States Senate election in Oklahoma
Incumbent Republican Senator James Lankford won re-election to a first full term in office, by a landslide margin of 43%, sweeping every county statewide in the Republican stronghold.


2016 United States Senate election in Oregon
The 2016 United States Senate election in Oregon was held November 8, 2016, to elect a member of the United States Senate to represent the State of Oregon, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Oregon
Incumbent Democratic Senator Ron Wyden was re-elected to a fourth full term in office.


2016 United States Senate election in Oregon, Working Families Party
The Working Families Party of Oregon, which usually cross-endorses Democratic candidates, nominated their own candidate in protest of Sen. Ron Wyden's support of the Trans-Pacific Partnership.


2016 United States Senate election in Oregon, Pacific Green Party and Oregon Progressive Party
The Pacific Green Party and the Oregon Progressive Party cross-endorsed Eric Navickas, former member of the Ashland, Oregon City Council.


2016 United States Senate election in Pennsylvania
The 2016 United States Senate election in Pennsylvania took place on November 8, 2016, to elect a member of the United States Senate to represent the Commonwealth of Pennsylvania, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in numerous other states and elections to the United States House of Representatives and various state and local elections. The primaries were held on April 26. Incumbent Republican U.S. Senator Pat Toomey was reelected to a second term in a close race, defeating Democratic nominee Katie McGinty and Libertarian Party nominee Edward Clifford. With a margin of 1.43%, this election was the second-closest race of the 2016 Senate election cycle, behind only the election in New Hampshire.


2016 United States Senate election in Pennsylvania, Background
Five-term Senator Arlen Specter, a longtime moderate Republican, switched to the Democratic Party in April 2009, and ran for reelection in 2010 as a Democrat. He was defeated in the Democratic primary by U.S. Representative and former U.S. Navy three-star admiral Joe Sestak. After a close race, Sestak lost the general election to former U.S. Representative Pat Toomey by 51% to 49%, a margin of 80,229 votes out of almost 4 million cast. Toomey had previously run for the seat in 2004, narrowly losing to Specter in the Republican Primary. Specter later died in 2012.


2016 United States Senate election in Pennsylvania, Background
After the Republicans took control of the Senate following the 2014 Senate elections, the election in Pennsylvania was seen by many as a top target for the Democrats, who hoped to regain their majority. Katie McGinty, who won the Democratic primary, was one of 160 candidates endorsed by Barack Obama. McGinty got her start in politics after winning the Congressional Fellowship of the American Chemical Society, leading to a position with then Senator Al Gore. In 1993  she was appointed deputy assistant and then chair of the White House Council of Environmental Quality under Bill Clinton. She then went on to be appointed head of the Pennsylvania Department of Environmental Protection by Governor Ed Rendell in 2003.


2016 United States Senate election in Pennsylvania, Democratic primary, Debates
A debate hosted by Carnegie Mellon University's Heinz College in association with the 14th Ward Independent Democratic Club featuring John Fetterman, Katie McGinty, and Joe Sestak occurred on January 31 at Rangos Hall in Jared L. Cohon University Center, Carnegie Mellon University, in Pittsburgh.


2016 United States Senate election in Pennsylvania, Democratic primary, Debates
A debate hosted by Keystone Progress featuring John Fetterman, Katie McGinty, and Joe Sestak occurred on February 19 at the Hilton Harrisburg, in the Harrisburg Ballroom, in Harrisburg.


2016 United States Senate election in South Carolina
The 2016 United States Senate election in South Carolina was held November 8, 2016, to elect a member of the United States Senate to represent the State of South Carolina, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. Both major parties held their primaries on June 14.


2016 United States Senate election in South Carolina
Incumbent Republican Senator Tim Scott won re-election to a first full term in office.


2016 United States Senate election in South Carolina
This election was only the third in U.S. history in which both major party nominees in a Senate election were African-American, as well as the second such election in South Carolina history.


2016 United States Senate election in South Carolina, Background
Two-term Republican Senator Jim DeMint was re-elected with 61.48% of the vote in 2010. He resigned at the start of 2013 to become President of The Heritage Foundation and U.S. Representative Tim Scott of South Carolina's 1st congressional district was appointed to replace him by Governor Nikki Haley. Scott subsequently won the special election in 2014 for the remaining two years of the term.


2016 United States Senate election in South Dakota
The 2016 United States Senate election in South Dakota was held November 8, 2016, to elect a member of the United States Senate to represent the State of South Dakota, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held June 7.


2016 United States Senate election in South Dakota
Incumbent Republican Senator John Thune was considered a potential 2016 presidential candidate, but decided instead to run for a third term in office.


2016 United States Senate election in South Dakota, Constitution Party
The Constitution Party nominated Kurt Evans for Senate depending on the resolution of a ballot-access legal action, however, the party's request to place a candidate on the ballot was not granted.


2016 United States Senate election in Utah
The 2016 United States Senate election in Utah took place on November 8, 2016, to elect a member of the United States Senate to represent the State of Utah, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Utah
The primaries took place on June 28. Misty Snow won the Democratic nomination, becoming the first transgender woman in the history of the United States to become a major party's nominee for the Senate.


2016 United States Senate election in Utah
Incumbent Republican Senator Mike Lee won re-election to a second term in office.


2016 United States Senate election in Utah, Republican primary
It was thought that Lee, a Tea Party Republican, might face a primary challenge from a member of the more establishment wing of the Party following his role in the unpopular 2013 federal government shutdown, which caused his approval ratings to drop precipitously. However, since that time, his approval ratings rose significantly.


2016 United States Senate election in Utah, Republican primary
Changes to Utah's primary system could adversely affect Lee's chances at renomination. Presently, Utah political parties hold conventions, where delegates attend and vote for candidates. Only if a candidate fails to gain at least 60% of the vote do the top two finishers proceed to a statewide primary election. In 2010, incumbent senator Bob Bennett finished third at the convention behind Lee and businessman Tim Bridgewater and was eliminated, with Lee defeating Bridgewater in the subsequent primary election.


2016 United States Senate election in Utah, Republican primary
Lee's approval rating is much higher among the smaller group of more conservative convention delegates and a recent change in the law, backed by the group Count My Vote, allows candidates to bypass the convention by collecting signatures to advance to the primary. Thus, a less conservative challenger could challenge Lee in the primary, appealing to more moderate Republican and unaffiliated voters, who could participate in the primary. The constitutionality of the changes have been challenged in court by the Utah Republican Party.


2016 United States Senate election in Utah, Republican primary
One possible challenger to Lee was former governor of Utah and former United States Secretary of Health and Human Services Mike Leavitt, one of the founders of Count My Vote, though he eventually denied interest in running. An effort to draft Huntsman Sr.'s son, Jon Huntsman Jr., the former governor of Utah, former United States Ambassador to China under Barack Obama and a candidate for President in 2012, was unsuccessful, with Huntsman ruling out a run against Lee.


2016 United States Senate election in Utah, Democratic primary, Candidates
Jonathan Swinton was the first Democrat to announce his candidacy for U.S. Senate, filing on August 10. The other candidates filing for the nomination were Craig Oliver, Jade Tuan Quoc Vo, and Misty K. Snow. Snow filed on March 3. Oliver withdrew before the state convention. Vo was eliminated in the first round of balloting.


2016 United States Senate election in Utah, Democratic primary, Candidates
Swinton faced criticism at the April 23 state convention from delegates who said he was pro-life, a criticism based primarily on Swinton's September 26 op-ed in the Salt Lake Tribune in which he describes himself as a "conservative Democrat" and "pro-life" while also calling for "a full investigation of Planned Parenthood." Swinton tried unsuccessfully to avoid discussing his views on abortion at the state convention.


2016 United States Senate election in Utah, Democratic primary, Candidates
After two rounds of balloting, neither Snow nor Swinton received the 60% of the vote they needed to secure the Democratic nomination. As a result, the two faced off in a June 28 primary, which Snow won.


2016 United States Senate election in Utah, Democratic primary, Candidates, Declined
A Dan Jones & Associates poll for UtahPolicy.com showed Snow leading with Democratic voters 33% to Swinton's 20%, as well as with independent voters, 23% to Swinton's 10%. The majority of the voters that were surveyed were undecided. The survey was administered from May 2–10, 2016 to 588 registered voters with a margin of error of +/- 4.04%.


2016 United States Senate election in Vermont
The 2016 United States Senate election in Vermont was held November 8, 2016, to elect a member of the United States Senate to represent the state of Vermont, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held August 9.


2016 United States Senate election in Vermont
Incumbent Democratic Senator Patrick Leahy, the most senior member in the Senate and the longest-serving U.S. Senator in Vermont history as well as the only Democrat to ever be elected to a Senate seat in Vermont, won re-election to a record eighth term in office.


2016 United States Senate election in Vermont, Liberty Union primary
This election was the last in which Diamondstone ran prior to his death in 2017. Diamondstone had run for Vermont statewide office in every biennial election since 1970.


2016 United States Senate election in Washington
The 2016 United States Senate election in Washington was held November 8, 2016, to elect a member of the United States Senate to represent the State of Washington. Incumbent Democratic Senator Patty Murray ran for re-election to a fifth term, and won by a significant margin, winning 59% of the vote, to Republican Chris Vance's 41%.


2016 United States Senate election in Washington
The election took place concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.


2016 United States Senate election in Washington
Under Washington's nonpartisan blanket primary law, all candidates appear on the same ballot, regardless of party. In the August 2 primary, voters had the choice to vote for any candidate, regardless of their party affiliation. The top two finishers—regardless of party—advance to the general election in November, even if a candidate manages to receive a majority of the votes cast in the primary election. California is the only other state with this system, a so-called "top two primary" (Louisiana has a similar "jungle primary", but there is no general election if one candidate receives 50% plus one vote of all votes cast in the primary).


2016 United States Senate election in Washington, General election, Results
At 1,913,979 votes, Murray made history by receiving the most votes in a United States Senate election in Washington state.


2016 United States Senate election in Wisconsin
The 2016 United States Senate election in Wisconsin was held November 8, 2016, to elect a member of the United States Senate to represent the State of Wisconsin, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held August 9, 2016.


2016 United States Senate election in Wisconsin
Incumbent Republican Senator Ron Johnson was re-elected to a second term in office. Former U.S. Senator Russ Feingold, whom Johnson unseated in the 2010 midterm elections, sought a rematch for a fourth non-consecutive term in office but was again defeated by Johnson, who became the first Republican to win a Senate election in Wisconsin during a presidential election year since Bob Kasten in 1980. Kasten was ultimately unseated by Feingold in 1992. Johnson's victory was considered an upset, as most polling had Feingold in the lead.


2016 United States Senate election in Wisconsin
As of 2021, this is the most recent statewide election in Wisconsin won by the Republican candidate (excluding non-partisan races), alongside Donald Trump's concurrent victory in the state's presidential contest.


2016 United States Senate election in Wisconsin, Background
In 2010, then-incumbent Democratic Senator Russ Feingold ran for re-election to a fourth term in 2010 but was defeated by Republican nominee Ron Johnson.


2016 United States Senate election in Wisconsin, Background
In March 2013, Johnson announced that he had begun fundraising for his campaign. At that time, he had just $1,529 remaining in his campaign account after raising $16.1 million for the 2010 election, over half of which he self-funded. Johnson said in November 2014 that he would not self-finance another campaign, saying: "I made my $9 million investment in this country. I gave it once, I don't think I should do it again." On May 14, 2015, Feingold announced he would run to win back his former Senate seat. Ultimately, Feingold spent over $24 million on the campaign and ended up with more remaining cash than Johnson, who spent only $20 million.


2016 United States Senate election in Wisconsin, Background
After the Republicans took control of the Senate following the 2014 Senate elections, the election in Wisconsin was seen by many as a top target for the Democrats, who hoped to retake their majority in the traditionally blue state. Politico pointed to Johnson's "worrisome" favorability ratings as one of the main reasons for his vulnerability. A March 2014 Marquette University Law School poll found that just 29% of voters had a favorable opinion of him.


2016 United States Senate election in Wisconsin, General election, By congressional district
Johnson won 6 of 8 congressional districts, including the Democratic held 3rd.


2016 United States Senate elections
The 2016 United States Senate elections were held on November 8, 2016. The presidential election, House elections, 14 gubernatorial elections, and many state and local elections were held on the same date.


2016 United States Senate elections
In the elections, 34 of the 100 seats—all Class 3 Senate seats—were contested in regular elections; the winners will serve six-year terms until January 3, 2023. Class 3 was last up for election in 2010, when Republicans won a net gain of six seats.


2016 United States Senate elections
In 2016, Democrats defended 10 seats, while Republicans defended 24 seats. Republicans, having won a majority of seats in the Senate in 2014, held the Senate majority with 54 seats before this election. Although Democrats made a net gain of two seats and did not lose any of their seats, Republicans retained control of the Senate for the 115th United States Congress. The two Democratic gains came from the defeats of incumbents Kelly Ayotte in New Hampshire and Mark Kirk in Illinois by Democrats Maggie Hassan and Tammy Duckworth, respectively.


2016 United States Senate elections
Despite Republicans retaining control of the Senate, 2016 marked the first time since 1986 where Democrats made a net gain of seats in Class 3. This is also the only election cycle since the popular-vote election of Senators was mandated by the Seventeenth Amendment in 1913 that the winning party in every Senate election mirrored the winning party for their state in the presidential election.


2016 United States Senate elections
This feat had nearly been accomplished earlier in 1920, which also involved the Class 3 Senate seats, and nearly repeated in 2020; in both cases, every state, with the exception of Kentucky in 1920 and Maine in 2020, voted for the same party in the presidential election and their Senate election. In addition, this election marked the first time since 2000 in which the party in opposition to the elected or reelected presidential candidate made net gains in the Senate; both cases involved the election of a Republican president and the Democrats making gains in the Senate.


2016 United States Senate elections
With the retirement of Harry Reid, Chuck Schumer became the Democratic leader after the elections, while Mitch McConnell retained his position as Senate Majority Leader.


2016 United States Senate elections
As of 2021, this is the most recent election cycle in which Republicans won Senate races in Arizona and Georgia. It is also the most recent election cycle where there were no special elections.


2016 United States Senate elections, Results summary
All 34 Class 3 senators were up for election in 2016; Class 3 consisted of 10 Democrats and 24 Republicans. Of the senators not up for election, 34 of the senators not up for election were Democrats, 30 senators were Republicans, and two Senators were independents who caucused with the Senate Democrats.


2016 United States Senate elections, Final pre-election predictions
Several sites and individuals publish predictions of competitive seats. These predictions look at factors such as the strength of the incumbent (if the incumbent is running for reelection) and the other candidates, and the state's partisan lean (reflected in part by the state's Cook Partisan Voting Index rating). The predictions assign ratings to each seat, indicating the predicted advantage that a party has in winning that seat.


2016 United States Senate elections, Final pre-election predictions
Where a site gives a percentage probability as its primary indicator of expected outcome, the chart below classifies a race as follows:


2016 United States Senate elections, Final pre-election predictions
The New York Times's Upshot gave the Democrats a 60% chance of winning the Senate on August 24, 2016; on September 23, their model gave Republicans a 58% chance to maintain control.


2016 United States Senate elections, Final pre-election predictions
All seats classified with at least one rating of anything other than "safe" or "solid" are listed below.


2016 United States Senate elections, Final pre-election predictions
All predictions considered the following states safe for the incumbent party.


2016 United States Senate elections, Primary dates
This table shows the primary dates for regularly-scheduled elections. It also shows the type of primary.


2016 United States Senate elections, Primary dates
RIndicates a state that requires primary run-off elections under certain conditions.


2016 United States Senate elections, Race summary, Elections leading to the next Congress
In these general elections, the winners were elected for the term beginning January 3, 2017; ordered by state.


2016 United States Senate elections, Alabama
Incumbent Republican Richard Shelby won re-election to a sixth term in office. The primaries were held on March 1. Ron Crumpton, a marijuana legalization activist, was the Democratic nominee. Shelby won re-election with 63.9% of the vote.


2016 United States Senate elections, Alabama
Shelby was first elected to the Senate in 1986 as a Democrat and was easily re-elected in 1992 as such. He switched his party affiliation to Republican on November 9, 1994, one day after the Republicans won control of both houses in the midterm elections. He won his first full term as a Republican in 1998 by a large margin and faced no significant opposition in 2004 or 2010.


2016 United States Senate elections, Alabama
Following the divisive Republican primary in Mississippi ahead of the 2014 election in which Senator Thad Cochran was almost defeated, it had been speculated that Shelby could also face a Tea Party primary challenger, due to his lengthy tenure and support for federal largesse. However, that didn't happen, in part due to his large campaign war chest, which stood at $19.4 million as of September 2015.


2016 United States Senate elections, Alabama
If Shelby had decided to retire, numerous high-profile Alabama Republicans were speculated to run, including U.S. Representatives Robert Aderholt, Mo Brooks, Bradley Byrne, Gary Palmer, Martha Roby, and Mike Rogers, State Treasurer Young Boozer, State Speaker Mike Hubbard, Lieutenant Governor Kay Ivey, State Senate President Pro Tempore Del Marsh, Secretary of State John Merrill, U.S. Appeals Court Judge William H. Pryor Jr., former Governor Bob Riley, and Attorney General Luther Strange. Shelby announced in January 2015 that he would run for re-election.


2016 United States Senate elections, Alaska
Two-term Senator Lisa Murkowski (Republican) was appointed in 2002 and elected to a full term in 2004. She was defeated in the Republican primary in 2010 by Joe Miller. She later ran as a write-in candidate in the 2010 general election and was re-elected to a second full term with 40% of the vote, making her one of two senators in US history to win election via write-in votes. She was 59 years old in 2016. She ran for re-election.


2016 United States Senate elections, Alaska
Thomas Lamb, a candidate for the State House in 2006, and Bob Lochner filed to run against Murkowski. Other potential Republican primary challengers included 2010 nominee and 2014 candidate Joe Miller, State Senator Mike J. Dunleavy, former Lieutenant Governor Mead Treadwell, and former Mayor of Anchorage Dan Sullivan.


2016 United States Senate elections, Alaska
The only person to file for the Democratic primary as of May 20 was writer and satirist Richard Grayson, who previously sought election to Wyoming's House seat in 2014. Potential Democratic candidates included State Senator Dennis Egan, State Representative Andy Josephson, State Senator Bill Wielechowski, State Senator Hollis French and State Senate Minority Leader Johnny Ellis. Former Senator Mark Begich was mentioned as a possible candidate, but he declined to run.


2016 United States Senate elections, Alaska
Murkowski won her primary on August 16, 2016 with 72 percent of the vote. Joe Miller received the Libertarian nomination and ran against Murkowski in the general election. Anchorage attorney and veteran Margaret Stock ran as an Independent candidate.


2016 United States Senate elections, Alaska
Murkowski won re-election with 44% of the vote compared to Miller with 30% and Metcalfe with 11%. 15% went to other candidates. Murkowski has been re-elected three times now with 48% in 2004, 39.5% in 2010 and 44% in 2016, never having won a majority.


2016 United States Senate elections, Arizona
Five-term Senator and Republican presidential candidate in 2008 John McCain was re-elected with 59% of the vote in 2010. He was 80 years old in 2016. Despite speculation that he might retire, McCain ran for re-election.


2016 United States Senate elections, Arizona
McCain faced primary challenges from Fair Tax activist Alex Meluskey, businessman David Pizer, talk radio host Clair Van Steenwyk, and State Senator Kelli Ward. David Pizer later dropped out of the race. Representatives Matt Salmon and David Schweikert were both mentioned as possible candidates, but both chose not to run. Other potential Republican candidates included former Governor Jan Brewer, businesswoman and 2014 gubernatorial candidate Christine Jones, former Governor of Alaska and 2008 vice presidential candidate Sarah Palin, former U.S. Representative John Shadegg, and former Arizona Attorney General Grant Woods.


2016 United States Senate elections, Arizona
Congresswoman Ann Kirkpatrick and teacher Lennie Clark ran for the Democratic nomination. Lennie Clark dropped out and Ann Kirkpatrick became the Democratic nominee. Other potential Democratic candidates included U.S. Representative Ruben Gallego, former Surgeon General and 2012 nominee Richard Carmona, 2014 gubernatorial nominee Fred DuVal, Phoenix Mayor Greg Stanton, and retired astronaut Mark Kelly, who is the husband of ex-Congresswoman Gabby Giffords.


2016 United States Senate elections, Arkansas
One-term Senator John Boozman (Republican) defeated two-term Senator Blanche Lincoln with 58% of the vote in 2010. He was 65 years old in 2016. Despite speculation that he might retire following health problems, Boozman ran for re-election. Fellow Republican Curtis Coleman, who ran against Boozman in 2010 but came in fifth place, ran again.


2016 United States Senate elections, Arkansas
Conner Eldridge, the former U.S. Attorney for the Western District of Arkansas, is the only Democrat who met the filing deadline.


2016 United States Senate elections, Arkansas
Frank Gilbert was the candidate for the Libertarian Party, and Jason Tate was running a write-in campaign.


2016 United States Senate elections, Arkansas
Incumbent Republican Senator John Boozman won re-election to a second term in office, becoming the first Republican senator re-elected in the history of the state.


2016 United States Senate elections, California
Four-term Senator Barbara Boxer (Democrat) was re-elected with 52% of the vote in 2010. Boxer declined to run for re-election. California Attorney General Kamala Harris and U.S. Representative Loretta Sanchez, both Democrats, finished first and second, respectively, in California's nonpartisan blanket primary, and contested the general election. As such, Boxer's successor was guaranteed to be a Democrat. This marked a historic first such occasion in California, ever since the Senate elections began in 1914.


2016 United States Senate elections, California
Other Democrats on the primary ballot included "President" Cristina Grappo, Massie Munroe, Herbert Peters, Emory Rogers, and Steve Stokes. Among the potential candidates who declined to run were Governor Jerry Brown, Lieutenant Governor Gavin Newsom, U.S. Representatives Xavier Becerra and Adam Schiff, and Los Angeles Mayor Eric Garcetti.


2016 United States Senate elections, California
Former state Republican Party chairs Tom Del Beccaro and Duf Sundheim, and former State Senator Phil Wyman ran, along with Don Krampe, Tom Palzer, Karen Roseberry, Greg Conlon, Von Huogo, Jerry Laws, Ron Unz, Jarrell Williamson, and George Yang. State Assemblymen Rocky Chavez was running as well, but withdrew from the race. Republicans who were once considered potential candidates but ruled out runs included San Diego Mayor Kevin Faulconer, former Assistant Secretary of the Treasury for Financial Stability and 2014 gubernatorial nominee Neel Kashkari, U.S. Representative Darrell Issa, and businesswoman and nominee for the U.S. Senate in 2010 Carly Fiorina.


2016 United States Senate elections, California
Independent Mike Beitiks ran on a single-issue climate change platform.


2016 United States Senate elections, California
Polling conducted by the SurveyUSA from March 30, 2016 to April 3, 2016 indicated that Harris was ahead with 26%, compared to Rep. Sánchez with 22%, Del Beccaro with 8%, Wyman with 8%, and Sundheim with 3%; 7% of those polled were supporting other candidates, and 24% were undecided.


2016 United States Senate elections, California
Harris won the election with 62% of the vote to Sanchez's 38%.


2016 United States Senate elections, Colorado
One-term Senator Michael Bennet (Democrat) was appointed in 2009 and elected to a full term with 48% of the vote in 2010. He was 51 years old in 2016. He ran for re-election.


2016 United States Senate elections, Colorado
Businessman Robert Blaha, former Aurora councilman Ryan Frazier, El Paso County Commissioners Darryl Glenn, and Peggy Littleton, former Colorado State University Athletic Director Jack Graham, State Representative Jon Keyser, former SBA director Greg Lopez, State Senator Tim Neville, and Jefferson County Commissioner Donald Rosier ran for the Republican nomination. Glenn, Graham, Blaha, Keyser, and Frazier actually competed in the primary.


2016 United States Senate elections, Colorado
Darryl Glenn won the Republican nomination with 37% of the vote against four other opponents.


2016 United States Senate elections, Colorado
Bennet won re-election with 50% of the vote to Glenn's 44%.


2016 United States Senate elections, Connecticut
One-term Senator Richard Blumenthal (Democrat) was elected with 55% of the vote in 2010. He was 70 years old in 2016. He ran for re-election.


2016 United States Senate elections, Connecticut
State Representative Dan Carter, apparel company CEO and 2004 Senate nominee Jack Orchulli, and former Olympic athlete August Wolf ran for the Republican nomination. Another potential candidate was former West Hartford Town Councilor Joe Visconti, who ran for CT-01 in 2008 and ran as an Independent for Governor in 2014. Former U.S. Comptroller General and 2014 candidate for Lieutenant Governor David M. Walker, former U.S. Representative and 2010 candidate Rob Simmons, and economist and former CNBC television host Lawrence Kudlow declined to run.


2016 United States Senate elections, Connecticut
Blumenthal won re-election with 63% of the vote to Carter's 35%.


2016 United States Senate elections, Florida
One-term Senator Marco Rubio (Republican) was elected in a three-way race with 49% of the vote in 2010. In April 2014, Rubio stated that he would not run for both the Senate and President in 2016, as Florida law prohibits a candidate from appearing twice on a ballot. In April 2015, he announced that he would run for President and would not seek re-election. After suspending his campaign on March 15, 2016, Rubio announced on June 22, 2016 that he changed his mind and will run for re-election.


2016 United States Senate elections, Florida
U.S. Representative Ron DeSantis, combat veteran Todd Wilcox, real estate developer Carlos Beruff, retired college lecturer Ilya Katz, and Donald J. DeRenzo ran for the Republican nomination. Ben Carson, retired neurosurgeon and candidate for President in 2016 is also mentioned as a potential candidate. On June 17, 2016, U.S. Representative David Jolly withdrew from the race to run for re-election to his House seat, four days after Rubio began openly considering reversing his decision to not run for re-election.


2016 United States Senate elections, Florida
U.S. Representative Patrick Murphy defeated fellow representative Alan Grayson, as well as Pam Keith, Lateresa Jones, Richard Coleman, Sam Brian Gibbons, and Josh Larose, for the Democratic nomination. Murphy lost to incumbent Marco Rubio in the November general election on November 8.


2016 United States Senate elections, Florida
Sen. Rubio won re-election with 52% of the vote compared to Murphy's 44%.


2016 United States Senate elections, Georgia
Two-term Senator Johnny Isakson (Republican) was re-elected with 58% of the vote in 2010. He was 71 years old in 2016. He ran for re-election. In 2015, Isakson announced he was being treated for Parkinson's disease, but stated that his treatment would not interfere with his re-election campaign or his ability to serve another term.


2016 United States Senate elections, Georgia
Mary Kay Bacallao, college professor, former Fayette County Board of Education member, and candidate for State Superintendent of Schools in 2014 and Derrick Grayson, candidate for the state's other Senate seat in 2014, challenged Isakson for the Republican nomination. Isakson won the Republican nomination with more than three quarters of the vote.


2016 United States Senate elections, Georgia
Investment firm executive Jim Barksdale, project manager Cheryl Copeland, and businessman John Coyne ran for the Democratic nomination. USAF veteran Jim Knox was running but dropped out of the race. Barksdale defeated Copeland in a close race to win the Democratic nomination.


2016 United States Senate elections, Hawaii
In 2012, Hawaii Governor Neil Abercrombie appointed Lieutenant Governor Brian Schatz (Democrat) to take the place of deceased nine-term Senator Daniel Inouye. Schatz won a 2014 special election to serve the remainder of Inouye's term. Schatz ran for re-election.


2016 United States Senate elections, Hawaii
Former U.S. Representative and 2014 Senate candidate Colleen Hanabusa considered challenging Schatz in the primary again, while U.S. Representative Tulsi Gabbard declined to seek the Democratic nomination for the seat.


2016 United States Senate elections, Hawaii
Charles Collins, a Republican who ran for the Senate in 2012 and for Governor in 2014, was seeking the nomination again, but withdrew from the race.


2016 United States Senate elections, Hawaii
Sen. Schatz won re-election with 74% of the vote compared to Carroll's 22%.


2016 United States Senate elections, Idaho
Three-term Senator Mike Crapo (Republican) was re-elected with 71% of the vote in 2010. Crapo was 65 years old in 2016. He ran for re-election. U.S Representative Raul Labrador declined to challenge Crapo in the Republican primary.