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Iowa Republican
The Iowa Republican caucuses are initially declared as a victory for Mitt Romney, however later counts show Rick Santorum with a small lead, however later counts show Ron Paul with a majority of delegates. The Iowa Democratic caucuses are won by Barack Obama. Neither caucus awards any delegates, but are to be used as a guide for delegate selection in June's party conventions. -
Sixth in Iowa
Representative Michele Bachmann, who came in sixth in Iowa, announces the suspension of her Presidential campaign, -
Debate in New Hampshire
Republican debate in Goffstown, New Hampshire, sponsored by ABC News and WMUR. -
Debate at Chubb Theatre
Republican debate at the Chubb Theatre at the Capitol Center for the Arts in Concord, New Hampshire, sponsored by NBC News, Facebook, and The Union Leader. -
Republican Primary
The New Hampshire Republican primary is won by Mitt Romney and New Hampshire Democratic primary by Barack Obama. -
Repulicans
Jon Huntsman, who came in third in New Hampshire, withdraws from the race and endorses Mitt Romney.
Recount in Iowa shows that Rick Santorum won the Republican caucuses.
Republican debates at the Myrtle Beach Convention Center in Myrtle Beach, South Carolina, sponsored by Fox News and the Republican Party of South Carolina. -
Rebulican Race
Rick Perry, who came in sixth in New Hampshire, withdraws from the race and endorses Newt Gingrich.
Republican debate in Charleston, South Carolina, sponsored by CNN and the Southern Republican Leadership Conference. -
Democratic Caucuses and Republican Primary
The Nevada Democratic Caucuses are won by Barack Obama. The South Carolina Republican primary is won by Newt Gingrich. -
Debaate
Republican debate at the University of South Florida in Tampa, Florida, sponsored by The St. Petersburg Times, NBC News, the National Journal and the Florida Council of 100. -
Debate
Republican debate in Jacksonville, Florida, sponsored by CNN and the Republican Party of Florida. -
Democratic Primary
The South Carolina Democratic primary is won by Barack Obama. -
Republican Primary
The Florida Republican primary is won by Mitt Romney. The Florida Democratic primary is won by Barack Obama. -
Republican Cuacuses
Nevada Republican caucuses are won by Mitt Romney.
Voting began in the Maine Republican caucuses: Paul gaining 21 delegates, and Romney 3. -
Democrate and Republican
The Minnesota Republican caucuses are won by Rick Santorum.
The Missouri Democratic Primary and Minnesota caucuses are won by Barack Obama. The Missouri Republican Primary is won by Rick Santorum, although the contest does not affect how Missouri's GOP delegates are awarded.
The Colorado Republican caucuses are won by Rick Santorum. -
Voting
Voting concludes in the Maine Republican caucuses, Mitt Romney is declared the winner. -
Republican Primary
Arizona Republican Primary won by Mitt Romney.
Michigan Republican Primary won by Mitt Romney. -
Wyoming caucuses
Wyoming caucuses won by Mitt Romney. -
Washington state Republican caucuses
won by Mitt Romney. -
Super Tuesday
Romney wins six states; Santorum, three states; Gingrich wins Georgia.
Alaska Republican district conventions – won by Mitt Romney.
Colorado Republican caucuses – won by Santorum.
Georgia primary – won by Newt Gingrich.
Idaho Republican caucuses – won by Mitt Romney.
North Dakota Republican caucuses – won by Rick Santorum.
Massachusetts primary – won by Mitt Romney.
Minnesota Republican caucuses – won by Rick Santorum.
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Virgin Islands
Virgin Islands Republican caucuses are won by Ron Paul, but most of the delegates were awarded to Mitt Romney -
Maine Democratic Caucuses
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Alabama Republican primary;
Alabama Republican primary; Hawaii, and American Samoa Republican caucuses; Mississippi Democratic and Republican Primaries; Utah Democratic caucuses -
Missouri Republican caucuses (52 delegates)
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Puerto Rico Republican caucuses – won by Romney
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Mitt Romney wins the Illinois primaries
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Louisiana primaries – won by Rick Santorum
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Arizona Democratic caucuses
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Maryland, Wisconsin, Washington DC primaries – won by Mitt Romney and Barack Obama, the latter of whom won enough delegates to win the Democratic nomination.
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Former US Senator Rick Santorum suspends his campaign for the Republican presidential nomination.
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Idaho Democratic caucuses, Kansas Democratic caucuses, Nebraska Democratic caucuses, Wyoming Democratic caucuses
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2012 Constitution Party National Convention held in Nashville, Tennessee[97]April 21 – Former US Congressman Virgil Goode wins the presidential nomination of the Constitution Party
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Republican National Committee declares Mitt Romney the presumptive nominee of the party.
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Former Speaker of the House of Representatives Newt Gingrich suspended his candidacy for the Republican presidential nomination and endorsed Mitt Romney
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2012 Libertarian National Convention
Held in Las Vegas, Nevada. Ron Paul wins the majority of delegates in Nevada and Maine. -
Political consultant Fred Karger suspends his Presidential campaign
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Green Party
Jill Stein wins the presidential nomination of the Green Party at the party's nominating covention held in Baltimore, Maryland. Cheri Honkala is the party's vice-presidential nominee. -
Romney and Ryan are nominated for President and Vice President, respectively, at the 2012 Republican National Convention held in Tampa, Florida.
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Obama and Biden are nominated for President and Vice President, respectively, at the 2012 Democratic National Convention was held in Charlotte, North Carolina
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First Presidential Debate at University of Denver in Denver, Colorado
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Vice Presidential Debate at Centre College in Danville, Kentucky
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Second Presidential Debate at Hofstra University in Hempstead, New York
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Third Presidential Debate at Lynn University in Boca Raton, Florida
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Election Day
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Electoral College elects Pres. and Vice pres.