

He then won majorities in delegations of three states whose non-binding primaries had been in favor of other candidates. On May 14, Paul announced that he would suspend funding the remaining primary contests and devote his resources to winning delegates at state conventions. 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. Santorum suspended his campaign on April 10, a week after losing Wisconsin and two other primaries to Romney. 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. 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). Romney carried six states and Santorum three, while Gingrich won his home state of Georgia. With ten states voting and 391 delegates being allocated, it had less than half the potential impact of its 2008 predecessor. Super Tuesday primaries took place on March 6. 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. Romney won New Hampshire, but lost South Carolina to Gingrich. 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). Three different candidates won the first three contests.

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. Congressman Ron Paul, former Governor Romney and former U.S. However, the field was down to four candidates by February 2012: Former House speaker Newt Gingrich, U.S. However, he lacked support from the party's conservative wing and the media narrative became: "Who will be the anti-Romney candidate?" Several candidates rose in the polls throughout the year.

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. The primary contest began in 2011 with a fairly wide field. 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. Delegates were elected in different ways that vary from state to state. 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. There were 2,286 delegates chosen, and a candidate needed to accumulate 1,144 delegate votes at the convention to win the nomination. The national convention then selected its nominee to run for President of the United States in the 2012 presidential election. Voters of the Republican Party elected state delegations to the 2012 Republican National Convention in presidential primaries.
