section_path: Selection process/Selection criteria
section_name: Selection criteria
paragraph_text: Selection criteria
  
  Though the vice president does not need to have any political experience, most major-party vice presidential nominees are current or former United States senators or representatives, with the occasional nominee being a current or former governor, a high-ranking former military officer (active military officers being prohibited under US law from holding political office), or a holder of a major position within the Executive branch. In addition, the vice presidential nominee has always been an official resident of a different state than the presidential nominee. While nothing in the Constitution prohibits a presidential candidate and his or her running mate being from the same state, the "inhabitant clause" of the Twelfth Amendment does mandate that every presidential elector must cast a ballot for at least one candidate who is not from their own state. Prior to the 2000 election, both George W. Bush and Dick Cheney lived in and voted in Texas. To avoid creating a potential problem for Texas's electors, Cheney changed his residency back to Wyoming prior to the campaign.
  
  Often, the presidential nominee will name a vice presidential candidate who will bring geographic or ideological balance to the ticket or appeal to a particular constituency. The vice presidential candidate might also be chosen on the basis of traits the presidential candidate is perceived to lack, or on the basis of name recognition. To foster party unity, popular runners-up in the presidential nomination process are commonly considered. While this selection process may enhance the chances of success for a national ticket, in the past it often resulted in the vice presidential nominee representing regions, constituencies, or ideologies at odds with those of the presidential candidate. As a result, vice presidents were often excluded from the policy-making process of the new administration. Many times their relationships with the president and his staff were aloof, non-existent, or even adversarial.
  
  Historically, the vice presidential nominee was usually a second-tier politician, chosen either to appease the party's minority faction, satisfy party bosses, or to secure a key state. Factors playing a role in the selection included: geographic and ideological balance, widening a presidential candidate's appeal to voters from outside their regional base or wing of the party. Candidates from electoral-vote rich swing states were usually preferred. A 2016 study, which examined vice-presidential candidates over the period 1884–2012, found that vice presidential candidates increased their tickets’ performance in their home states by 2.67 percentage points on average.