President Barack Obama today signaled an aggressive tact for his early re-election campaign, critiquing his Republican opponents by name and insisting he's ready to "fight with every fiber of my being" for a second term. 
 
 "How much do you want it?" ABC News' Diane Sawyer asked Obama during an exclusive interview in Las Vegas. 
 
 "Badly," the president said, "because I think the country needs it." 
 
 "Whoever wins the Republican primary is going to be a standard bearer for a vision of the country that I don't think reflects who we are," Obama said. 
 
 "I'm going to fight as hard as I can with every fiber of my being to make sure that we continue on a path that I think will restore the American dream," he said. 
 
 Obama pushed back against what he called Republicans' "rhetorical flourishes," including Newt Gingrich's oft-repeated contention that Obama is the "food stamp president." 
 
 "First of all, I don't put people on food stamps," Obama said. "People become eligible for food stamps. Second of all, the initial expansion of food-stamp eligibility happened under my Republican predecessor, not under me. No. 3, when you have a disastrous economic crash that results in 8 million people losing their jobs, more people are going to need more support from government." 
 
 "The larger point is this: that there's going to be a debate over the next eight, nine, 10 months about how to move the country forward," he said. "They've got an argument. They will make it forcefully. I think it's an argument that is wrong." 
 
 Asked whether he believes there's an undercurrent of racial tension in the "food stamp president" criticism, Obama wouldn't say. But he said the rhetoric from conservatives like that used by Gingrich illustrates an attempt by Republicans to engage in the same divisiveness that they profess to decry. 
 
 "The American people are going to make a judgment about who's trying to bring the country together and who's dividing it, who reflects the core values that helped create this country … and who is tapping into some of our worst instincts," he said. 
 
 MORE: Obama tells Sawyer he second-guesses himself constantly 
 
 Obama also used his first network interview since his State of the Union Address to single out three of his Republican rivals, jabbing Mitt Romney, Newt Gingrich and Rick Santorum as adherents of a failed political philosophy. 
 
 "We've got a test of Mr. Romney or Mr. Gingrich or Mr. Santorum's theories. We tried it for 10 years. And it resulted in a huge crash that lost us the most jobs since the 1930s," Obama said of a push for less financial regulation and lower taxes. "And why we would want to adopt something that we just tried and did not work, doesn't make sense." 
 
 Obama said the alternative he's offering – higher taxes on the wealthy, particularly millionaires and billionaires, to bankroll new government spending -- is a "a recipe for a fair, sound approach to deficit reduction and rebuilding this country," which he outlined in his speech to Congress and the nation Tuesday night. 
 
 "I think whether it's Romney or Gingrich or Santorum or any of these folks, the question to ask them is we now have the lowest tax rates in 50 years. We've seen the highest increase in income for the very top echelons since the 1920s. And if, in fact, we're going to reduce our deficit while still investing in those things that we know make America grow, somebody's got to pay for it," he said. 
 
 "I think better I pay for it or Mr. Romney pay for it or Mr. Gingrich help pay for it than a senior citizen suddenly seeing several thousands of dollars in additional Medicare increases or a student who's trying to struggle their way through school," he added. 
 
 MORE: Obama on what really happened in encounter with Gov. Brewer 
 
 First Family Readies for Campaign 
 
 While the White House has said the president will not fully engage in his re-election campaign until Republicans pick a nominee, Obama said his family is fully prepared for the quickly escalating fight expected on the trail in the days ahead. 
 
 "Michelle is very enthusiastic about campaigning for the next nine months," Obama said. " And that hasn't always been the case. I mean, this puts a strain on families. But I think she feels very strongly that we're moving the country in the right direction. I'll let her speak for herself ... but what she's told me is, "We should finish the job.'" 
 
 "And the girls?" Sawyer asked of the Obamas' daughters, Sasha, 10, and Malia, 13. 
 
 "Fortunately, they don't spend too much time worrying about their daddy's job. They've their own stuff to worry about, including doing their homework, cleaning their room and, the state of their sports teams," he said. 
 
 Watchful Eye on Iran 
 
 Obama said he's keeping a watchful eye on tension between Israel and Iran over the country's alleged clandestine nuclear program, but would not say whether the United States believes the Israelis are preparing a military strike. 
 
 "I can't discuss classified military information, certainly not information that's shared between countries," Obama said. 
 
 "But you cannot pursue a nuclear weapon. We've imposed the toughest sanctions ever. They had a lot of bite. The Iranian regime is feeling them. And, ultimately, I hope that we can resolve this through diplomatic means. But we're not taking any options off the table." 
 
 MORE: Is Obama rooting for the Patriots, or Giants? 
 
 MORE: Obama says SEALs rescue made him reflect on daughters ||||| (Image Credit: Haraz N. Ghanbari/AP Photo) 
 
 President Obama denied in an exclusive interview with ABC News that he was "tense" in his airport tarmac encounter with Arizona Gov. Jan Brewer Wednesday, as she has described. 
 
 "I'm usually accused of not being intense enough, right," he told ABC News' Diane Sawyer, laughing. "Too relaxed." 
 
 Brewer said in an interview that the president was "somewhat thin-skinned and a little tense, to say the least" and that she was "shocked by the sternness of it all." The president reportedly raised objections to Brewer's description of their meeting in June, 2010, when he met her Wednesday. 
 
 In her 2011 book, "Scorpions for Breakfast," Brewer accused Obama of being "condescending" and "patronizing" and complained that she and her aides were treated coldly by White House staffers. 
 
 Read Jan Brewer's hand-written letter to President Obama here 
 
 "I think it's always good publicity for a Republican if they're in an argument with me," Obama said of their most recent meeting. "But this was really not a big deal. She wanted to give me a letter, asking for a meeting. And I said, 'We'd be happy to meet.' 
 
 "Last time we met, she wasn't fully satisfied. But, you know, I think this is a classic example of things getting blown out of proportion." 
 
 Watch 'World News' tonight at 6:30 ET for Diane Sawyer's interview with President Obama. ||||| Mitt Romney ignored the most significant expansion of trade ties in nearly two decades when he accused the Obama administration Monday night of doing nothing to open new markets. Rick Santorum claimed to be taking purely the high road in campaign ads even as a new one from him veered from that path. 
 
 Former Massachusetts Gov. Mitt Romney, left, and former House Speaker Newt Gingrich participate in the South Carolina Republican presidential candidate debate in Myrtle Beach, S.C., Monday, Jan. 16, 2012.... (Associated Press) 
 
 Republican presidential candidates, from left to right: Texas Gov. Rick Perry; former Pennsylvania Sen. Rick Santorum; former Massachusetts Gov. Mitt Romney; former House Speaker Newt Gingrich; and Rep.... (Associated Press) 
 
 People view the Republican presidential debate on a large video screen outside of the Myrtle Beach Convention Center, Monday, Jan. 16, 2012, in Myrtle Beach, S.C. (AP Photo/Matt Rourke) (Associated Press) 
 
 Newt Gingrich mischaracterized the Chilean retirement system that he favors as a partial model for the United States, declaring that the system of private accounts is voluntary when it's not. 
 
 So it went in the latest Republican presidential debate as the candidates took shortcuts with complex realities and committed some outright distortions. A look at some of the claims and how they compare with the facts: 
 
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 ROMNEY: "This president has opened up no new markets for American goods around the world in his three years, even as European nations and China have opened up 44." 
 
 THE FACTS: Actually, Obama revived Bush-administration-era free-trade pacts with South Korea, Panama and Columbia, all passed by Congress in October, in the biggest round of trade liberalization since the North American Free Trade Agreement and other pacts of that era. 
 
 In particular, the agreement with South Korea is designed to break down barriers between the United States and the world's 15th-largest economy. The South Korea deal has the potential to create as many as 280,000 American jobs, according to a recent assessment by the staff of the U.S. International Trade Commission, and to boost exports by more than $12 billion. 
 
 Obama also, on a recent trip to Asia, endorsed an Asia-Pacific free-trade pact that would also boost U.S. exports to Asia. With economies weak, the benefits of freer trade may not be immediate but Romney was incorrect to say President Barack Obama has opened "no new markets." 
 
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 SANTORUM: "My ads have been positive. The only ad that I've ever put up has contrasted myself with the other candidates, and does so in a way talking about issues." 
 
 THE FACTS: Santorum is coming out with an ad this week accusing Romney of being "just like Obama" and saying Romney "once bragged he's even more liberal than Ted Kennedy on social issues," two negative assertions that go beyond a mere look at issues. 
 
 As a Massachusetts senate candidate in 1994, Romney wrote to a group of gay Republicans that outlined a plan to do better than Kennedy to make "equality for gays and lesbians a mainstream concern." But that's not bragging about liberalism, and Romney is hardly more liberal than the late senator _ or Obama _ on social issues. Romney, for example, supports a constitutional amendment to ban gay marriage. 
 
 Santorum has, in fact, stayed positive in the campaign but the new ad is a departure from that. 
 
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 GINGRICH on Chile's system of private retirement accounts: "First of all, it's totally voluntary. If you want to stay in the current system, stay in it. If you are younger and you want to go and take a personal savings account, which would be a Social Security savings account, you can take it." 
 
 THE FACTS: There is nothing voluntary about Chile's system. It requires that all workers contribute 10 percent of their salaries to private pension plans, plus other fees for insurance, instead of a government program like Social Security. 
 
 Workers had a choice when Chile created the private pensions in 1981 but after that phase-in, all new employees have been required to contribute 10 percent of their first $33,360 in annual wages, choosing among five funds whose investments range from safe bonds to riskier stocks. 
 
 The Chile model was also a favorite of Herman Cain when he was in the Republican race. He, too, mischaracterized the system as optional. 
 
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 ROMNEY: "We invested in well over 100 different businesses. And the people have looked at the places that have added jobs and lost jobs and that record is pretty much available for people to take a close look at." 
 
 THE FACTS: Romney's record as a venture capitalist at Bain Capital has been presented by his campaign highly selectively; namely, by detailing several big success stories and ignoring the job losses that resulted from Bain-owned plants and companies that closed or shrank their workforce. 
 
 His overall record is not even close to being known, because it is so complex. Many of the companies are private, without the public disclosure requirements that big corporations have, and his campaign has not released details. 
 
 Under scrutiny, Romney has stepped back from claiming that he created more than 100,000 jobs overall with his Bain investments. That claim was never substantiated. In the debate, he named four successful investments in companies that now _ a decade after he left Bain _ employ about 120,000 people, a more measured and accurate statement, but one that still does not account for losses elsewhere. 
 
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 RON PAUL: "Taliban are people who want _ their main goal is to keep foreigners off their land. It's the al-Qaida _ you can't mix the two. The al-Qaida want to come here to kill us. The Taliban just says we don't want foreigners. We need to understand that or we can't resolve this problem in the Middle East." 
 
 THE FACTS: What Paul is missing is that the Taliban harbored foreigners in their land _ al-Qaida terrorists who came to the United States and killed Americans_ and that the Obama administration fears that might happen again if the Taliban regain control in Kabul. 
 
 He was correct that the U.S. prior to the 2001 terrorist attacks did not consider the Taliban to be a threat to the U.S. homeland. 
 
 ___ 
 
 ROMNEY: "Three years into office, he doesn't have a jobs plan." 
 
 FACT CHECK: Like them or not, Obama has proposed several plans intended to spur the economy and create jobs. The most well-known was his stimulus plan, introduced in February 2009, which included about $800 billion in tax cuts and spending. 
 
 At the end of 2010, Obama struck a deal with GOP congressional leaders on a package intended to stimulate hiring and growth. The deal cut the Social Security payroll tax, which provided about an extra $1,000 a year to an average family. It also extended an unemployment benefits program that provided up to 99 weeks of aid. 
 
 And in September, Obama introduced his most recent jobs plan, rolling it out in a speech to the full Congress in which he urged Congress to "pass it right away." It included $450 billion in tax cuts and new spending, including greater cuts to payroll taxes and tax breaks for companies that hire those who've been out of work for six months or more. Almost none of it has been passed into law. 
 
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 GINGRICH: Romney "raised taxes." 
 
 ROMNEY: "We reduced taxes 19 times." 
 
 THE FACTS: Both assertions were basically true, though decidedly one-sided. 
 
 Romney largely held the line on tax increases but there were notable exceptions. The state raised business taxes by $140 million in one year with measures mostly recommended by Romney. As well, the Republican governor and Democratic lawmakers raised hundreds of millions of dollars from higher fees and fines _ taxation by another name. Romney himself proposed raising nearly $60 million by creating 33 new fees and increasing 57 others. Romney won praise from anti-tax advocates by firmly backing income tax cuts _ and criticism over the business taxes and fees. 
 
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 GINGRICH: "More people have been put on food stamps by Barack Obama than any president in American history." 
 
 THE FACTS: It's gotten easier to qualify for food stamps in the past decade but that is because of measures taken before Obama became president. 
 
 It's true that the number of people on food stamps is now at a record level. That's due mainly to the ailing economy, which Republicans blame on Obama, as well as rising food costs. 
 
 The worst downturn since the Great Depression wiped out 8.7 million jobs, pushed the unemployment rate to a peak of 10 percent in October 2009 and increased poverty. 
 
 More than 46.2 million people were on food stamps in October 2011, down slightly from a record 46.3 million in September. That's up from fewer than 31 million people three years earlier. 
 
 Eligibility rules were relaxed in 2002 and 2008 during the Bush administration. Obama's stimulus package, passed in February 2009, relaxed the program's work requirements through September 2010. 
 
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 Associated Press writers Christopher S. Rugaber, Tom Raum, Steve Peoples, Robert Burns and Mary Clare Jalonick contributed to this report.
– Barack Obama appears to be shifting into campaign mode. In an interview with Diane Sawyer of ABC News last night, the president wasn't afraid to call out his would-be challengers by name, saying, "We've got a test of Mr. Romney or Mr. Gingrich or Mr. Santorum's theories. We tried it for 10 years. It resulted in a huge crash." He also directly took on Newt Gingrich's assertion that he is a "food stamp president." "I don't put people on food stamps. People become eligible for food stamps," he said, pointing out that eligibility was expanded under George W. Bush, and that "when you have a disastrous economic crash … more people are going to need more support." Asked how much he wanted another term, he replied, "Badly. Because I think the country needs it." He also brushed off his "tense" tarmac showdown with Jan Brewer. "I'm usually accused of not being intense enough, right?" he said. "I think it's always good publicity for a Republican if they're in an argument with me. But this was really not a big deal. I think this is a classic example of things getting blown out of proportion."