Voters of the Republican Party elected state delegations to the 2012 Republican National Convention in presidential primaries. The national convention then selected its nominee to run for President of the United States in the 2012 presidential election. There were 2,286 delegates chosen, and a candidate needed to accumulate 1,144 delegate votes at the convention to win the nomination. The caucuses allocated delegates to the respective state delegations to the national convention, but the actual election of the delegates were, many times, at a later date. Delegates were elected in different ways that vary from state to state. They could be elected at local conventions, selected from slates submitted by the candidates, selected at committee meetings, or elected directly at the caucuses and primaries.

The primary contest began in 2011 with a fairly wide field. Mitt Romney, the former governor of Massachusetts and the runner-up in the 2008 primaries, had been preparing to run for president ever since the 2008 election, and was from early on the favorite to win the nomination. However, he lacked support from the party's conservative wing and the media narrative soon revolved around speculation on a conservative or "anti-Romney" candidate who would challenge Romney in the primaries. Several candidates rose in the polls throughout the year. However, the field was down to four candidates by February 2012: Former House speaker Newt Gingrich, U.S. Representative Ron Paul, former Governor Romney and former U.S. Senator Rick Santorum. It was the first presidential primary to be affected by a Supreme Court ruling that allowed unlimited independent expenditures to support or oppose candidates through super PACs.

Three different candidates won the first three contests. Santorum, who had been running a one-state campaign in Iowa, narrowly won in that state's caucuses by a handful of votes over Romney (who was thought to have won the caucuses before a recount). Romney won New Hampshire, but lost South Carolina to Gingrich. From there, Romney regained his momentum by winning the crucial state of Florida, while Santorum took his campaign national and carried three more states before Super Tuesday, while Romney carried seven states.

Super Tuesday primaries took place on March 6. With ten states voting and 391 delegates being allocated, it had less than half the potential impact of its 2008 predecessor. Romney carried six states and Santorum three, while Gingrich won his home state of Georgia. Twelve more events were held in March, including all of the territorial contests and the first local conventions that allocated delegates (Wyoming's county conventions). Santorum won Kansas and three Southern primaries, but was unable to make any significant gains on Romney, who maintained a solid lead over all other contenders after securing more than half of the delegates allocated in the month of March.

Santorum suspended his campaign on April 10, a week after losing Wisconsin and two other primaries to Romney. Gingrich followed suit on May 2, after the Republican National Committee (RNC) declared Romney the presumptive nominee on April 25 and put its resources behind him. On May 14, Paul announced that he would suspend funding the remaining primary contests and devote his resources to winning delegates at state conventions. He then won majorities in delegations of three states whose non-binding primaries had been in favor of other candidates. On May 29, Romney reached the nominating threshold of 1,144 delegates by most projected counts following his primary win in Texas and was congratulated by RNC Chairman Reince Priebus for "securing the delegates needed to be our party's official nominee at our convention in Tampa." With his subsequent victories in California and several smaller states, Romney surpassed a majority of bound delegates on June 5.

Romney chose congressman Paul Ryan to be his running mate, but they went on to lose the general election to incumbent President Barack Obama. Ryan later went on to serve a term as Speaker of the United States House of Representatives and Romney was elected to the U.S. Senate from Utah in 2018.

As of 2024, these are the most recent Republican Party presidential primaries where Donald Trump didn't run in, and also the most recent primary in which Trump wasn’t chosen as the nominee.

Candidates

Candidate Most recent office DelegateHard Count DelegateSoft Count Candidacy Delegations with pluralityMitt Romney Governor of Massachusetts(2003–2007) 1,462 1,524 Secured nomination: May 29, 2012(Campaign) 43  AK, AS, AZ, AR, CA, CO, CT, DE, D.C., FL, GU, HI, ID, IL, IN, KY,   MD, MA, MI, MO, NE, NV, NH, NJ, NM, NY, NC, MP, OH OR, PA, PR, RI, SD, TX, VI, UT, VT, VA, WA WV, WI, WY Rick Santorum  U.S. Senator from Pennsylvania  (1995–2007) 234 261 Withdrew:April 10, 2012(Campaign) 6 AL, KS, ND, MS, OK, TN Ron Paul U.S. Representative from Texas(1976–1977, 1979–1985, 1997–2013) 154 190 Lost nomination: August 30, 2012(Campaign) 4IA, ME, MN, LA Newt Gingrich Speaker of the U.S. House of Representatives(1995–1999) 137 142 Withdrew: May 2, 2012(Campaign) 2GA, SC

2012 Republican nominee NameBornCurrent/previous positionsHome StateAnnouncedCandidacyRunning mateMitt RomneyMarch 12, 1947Detroit, MichiganGovernor of Massachusetts(2003–2007)June 2, 2011 Paul Ryan

Did not withdraw On May 14, 2012, Paul announced that he would no longer actively campaign in states that have not held primaries, but rather focus on a strategy to secure delegates before the convention. 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. Although he was not named the 2012 Republican nominee, he did not officially end his campaign or endorse nominee Mitt Romney for president. At the convention, Ron Paul received second place with 8% of the delegates.

NameBornCurrent/recentHome StateAnnouncedWithdrewCandidacyEndorsedRef.Ron PaulAugust 20, 1935Pittsburgh, Pennsylvania U.S. Representative from Texas(1976–1977, 1979–1985, 1997–2013)May 13, 2011Lost nomination: August 30, 2012(Campaign • Positions)No endorsement

Withdrew after the primaries Karger was not invited to any of the televised debates, but participated in the December WePolls.com online debate along with Gary Johnson and Buddy Roemer. He came in 4th place with 1,893 votes in Puerto Rico, 1,180 votes in Michigan, 10 votes in Iowa, 345 votes in New Hampshire, 377 votes in Maryland, 6,481 votes in his home state of California, and 545 votes in Utah, amounting up to a total of 10,831 votes. He withdrew following a 5th-place finish in the Utah primary, which was the final primary of the 2012 cycle. Karger received no delegate votes at the convention.

NameBornCurrent/recentHome StateAnnouncedWithdrewCandidacyEndorsedRef.Fred KargerJanuary 31, 1950 Glencoe, IllinoisPolitical consultant and gay rights activistMarch 23, 2011June 29, 2012(Campaign)No endorsement

Withdrew during the primaries The following individuals participated in at least two presidential debates. They withdrew or suspended their campaigns at some point after the Iowa caucuses on January 3, 2012. They are listed in order of exit, starting with the most recent.

NameBornCurrent/recentState AnnouncedWithdrewCandidacyEndorsedRef.Newt GingrichJune 17, 1943Harrisburg, Pennsylvania, U.S.Speaker of the U.S. House of Representatives(1995–1999)May 1, 2011 (erroneously)May 11, 2011 (officially)May 2, 2012(Campaign • Positions)Mitt RomneyRick SantorumMay 10, 1958Winchester, VirginiaU.S. Senator from Pennsylvania (1995–2007)June 6, 2011April 10, 2012(Campaign • Positions)Mitt RomneyBuddy RoemerOctober 4, 1943Shreveport, Louisiana Governor of Louisiana(1988–1992)June 21, 2011February 22, 2012(Campaign)No endorsementRick PerryMarch 4, 1950Haskell, Texas Governor of Texas(2000–2015)August 13, 2011January 19, 2012(Campaign • Positions)Newt Gingrich, then Mitt RomneyJon Huntsman Jr.March 26, 1960Redwood City, California U.S. Ambassador to China(2009–2011)Governor of Utah(2005–2009)June 21, 2011January 16, 2012(Campaign)Mitt RomneyMichele BachmannApril 6, 1956Waterloo, IowaU.S. Representative from Minnesota(2007–2015)June 13, 2011January 4, 2012(Campaign • Positions)Mitt Romney

Declined to seek nomination

Delegate Hard Count: This only included bound delegates that had to vote for a candidate even if they supported another candidate. Delegate Soft Count: This only included delegates allocated at the primaries and unallocated delegates that were elected at their local conventions or committees. It did not include any projections on future local conventions or the 117 unbound RNC delegates that were not a part of the primary election process. A breakdown of this historical count is found in the Primary Schedule below. Plurality: A candidate secured a delegation when he has the highest number of delegates that could vote for him on the first ballot in the nomination at the National Convention. According to RNC rules it took plurality in five delegations to be on the first ballot at the National Convention, and it took 1,144 delegates at the roll call of the ballots to become the Republican nominee.

Timeline of the race

The primary contests took place from January 3 to July 14 and elected and allocated 2,286 voting delegates to the 2012 Republican National Convention in the week of August 27. To become the Republican Party's nominee for the 2012 presidential election a candidate needed a majority of 1,144 delegates to vote for him and plurality in five state delegations. The 2012 race was significantly different from earlier races. Many states switched from their old winner-take-all allocation to proportional allocation. Many remaining winner-take-all states allocated delegates to both the winner of each congressional district and the winner of the state. The change was made to prolong the race, giving lesser known candidates a chance and making it harder for a frontrunner to secure the majority early. It was also hoped that this change in the election system would energize the base of the party.

Most of the candidates started their campaigns in mid-2011, but after the first two primaries in Iowa and New Hampshire, only four well-funded campaigns (Romney, Gingrich, Santorum, and Paul) remained for the Republican Party nomination; Gary Johnson had withdrawn to run on the Libertarian ticket, and Buddy Roemer sought the American Elect nomination. At the beginning of May, Gingrich and Santorum suspended their campaigns; Romney was widely reported as the presumptive nominee, with Paul the only other major candidate running an active campaign.

Beginning (2011)

The 2008 Republican National Convention decided that the 2012 primary schedule generally would be subject to the same rules as the 2008 delegate selection contests, but on August 6, 2010, the Republican National Committee (RNC) adopted new rules for the timing of elections, with 103 votes in favor out of 144. Under this plan, allocation of delegates to the national convention were to be divided into three periods: February 1 – March 5, 2012: Contests of traditional early states Iowa, New Hampshire, Nevada and South Carolina, March 6–31, 2012: Contests that proportionally allocate delegates, April 1, 2012, and onward: All other contests including winner-take-all elections.