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• Mitt Romney officially nominated at Republican National Convention

The withdrawal of candidate Rick Santorum on April 10, 2012, eliminated his main challenger and all but guaranteed him the nomination. Newt Gingrich's exit from the race on May 2 left him against Ron Paul and Fred Karger. His win in Texas on May 29 finally accumulated enough delegates to mathematically secure him the nomination. Romney was officially announced as the 2012 Republican presidential nominee on August 28, 2012.^[2] He was defeated by incumbent President Barack Obama in the general election on November 6, 2012.^[3]

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• Ron Paul announces he will not seek U.S. House re-election in 2012; will focus on presidential campaign

Leading up to the convention, Ron Paul won bound pluralities of the official delegations from the states of Iowa, Louisiana, Maine, Minnesota, Nevada, and Oregon (but not the Virgin Islands, despite winning the popular vote there). Due to disputes these were reduced to Iowa, Minnesota, and Nevada; however, he additionally had nomination-from-the-floor-pluralities in the states of Oregon and Alaska, plus the Virgin Islands.^[5] Although he wasn't named the 2012 Republican nominee, he did not officially end his campaign or endorse nominee Mitt Romney for president.^[6][7][8] At the convention, Ron Paul received second place with 8% of the delegates.

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• Poll shows former U.S. Speaker Newt Gingrich as latest GOP presidential frontrunner

After a poor showing in the Delaware primaries, Gingrich's advisers hinted on April 25, 2012, that he would exit the race the following week.^[11] He officially ended his campaign on May 2, and endorsed Mitt Romney.^[12] Gingrich received no delegate votes at the convention, having released his bound delegates to Romney.

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• Rick Santorum drops U.S. presidential bid

Santorum suspended his campaign following the hospitalization of his three-year-old daughter Isabella, as well as a strong showing by front runner Mitt Romney in primaries and polls.^[14][15][16] He conceded the race to Romney later that day, though didn't fully endorse him until May 7.^[17][18][19] Santorum received nine delegate votes at the convention, coming in third behind Romney and Ron Paul, despite having officially released his bound delegates to Romney.

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• Wikinews interviews Buddy Roemer, U.S. Republican Party presidential candidate

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• Buddy Roemer ends Republican presidential bid to seek Reform Party nomination

Roemer was not invited to any of the televised debates, but participated in the November LibertyPAC online debate with Gingrich, Johnson, and Santorum, and then also in the December WePolls.com online debate along with Gary Johnson and Fred Karger. He received a total of 30,523 votes from Iowa New Hampshire, Tennessee, Michigan, Georgia, Louisiana, Texas, California, and Puerto Rico, where he came in third place. On February 22, he withdrew from the Republican race to pursue nomination as a member of the Reform Party.^[21] Roemer received one delegate-vote at the convention.

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• Rick Perry withdraws from U.S. presidential race, endorses Gingrich

After doing poorly in Iowa and New Hampshire, he suspended his campaign, endorsing Newt Gingrich.^[23] On April 25, he switched his endorsement to Mitt Romney, after advisers hinted that Gingrich would withdraw from the race.^[24] He remained on the ballot in most states prior to Super Tuesday, and received 54,769 votes during the primary season. Perry received no delegate votes at the convention.

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• U.S. Presidential candidate Michele Bachmann narrowly edges Ron Paul in Ames Straw Poll

After winning the Ames Straw Poll, her candidacy collapsed and after coming sixth in the Iowa caucuses, she suspended her presidential campaign.^[28] After months of speculation, Bachmann endorsed Mitt Romney on May 3.^[29] She remained on the ballot in most states prior to Super Tuesday, and received 41,401 votes during the primary season, collecting two 'soft' delegates. Bachmann received one delegate vote at the convention.

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• Herman Cain endorses Newt Gingrich for US president

After a series of scandals, Cain suspended his presidential campaign, and after momentarily reviving it as part of Stephen Colbert's satirical presidential campaign, endorsed Newt Gingrich on January 28, 2012.^[31][32] On April 17, 2012, he changed his endorsement to Mitt Romney.^[33] He remained on the ballot in a number of states, and has received 13,629 votes during the primary season. Cain received no delegate votes at the convention.