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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.
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Representative Michele Bachmann, who came in sixth in Iowa, announces the suspension of her Presidential campaign,
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Republican debate in Goffstown, New Hampshire, sponsored by ABC News and WMUR.
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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.
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The New Hampshire Republican primary is won by Mitt Romney and New Hampshire Democratic primary by Barack Obama.
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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. -
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. -
The Nevada Democratic Caucuses are won by Barack Obama. The South Carolina Republican primary is won by Newt Gingrich.
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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.
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Republican debate in Jacksonville, Florida, sponsored by CNN and the Republican Party of Florida.
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The South Carolina Democratic primary is won by Barack Obama.
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The Florida Republican primary is won by Mitt Romney. The Florida Democratic primary is won by Barack Obama.
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Nevada Republican caucuses are won by Mitt Romney.
Voting began in the Maine Republican caucuses: Paul gaining 21 delegates, and Romney 3. -
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 concludes in the Maine Republican caucuses, Mitt Romney is declared the winner.
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Arizona Republican Primary won by Mitt Romney.
Michigan Republican Primary won by Mitt Romney. -
Wyoming caucuses won by Mitt Romney.
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won by Mitt Romney.
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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 Republican caucuses are won by Ron Paul, but most of the delegates were awarded to Mitt Romney
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Alabama Republican primary; Hawaii, and American Samoa Republican caucuses; Mississippi Democratic and Republican Primaries; Utah Democratic caucuses
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Held in Las Vegas, Nevada. Ron Paul wins the majority of delegates in Nevada and Maine.
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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.
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