Photos: Super Tuesday

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Boston, MA, USA — Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets supporters at the end of his Super Tuesday campaign rally in Boston, Tuesday, March 6, 2012. (AP Photo/Stephan Savoia) link to this photo

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Fargo, ND — Republican Presidential candidate Ron Paul spoke to an enthusiastic crowd of several hundred gathered on Tuesday, March 6, 2012 in a hotel ballroom in in Fargo, N.D. (MPR Photo/Dan Gunderson) link to this photo

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Fargo, ND — Republican Presidential candidate Ron Paul drew loud applause from a crowd of several hundred gathered Tuesday, March 6, 2012 in a Fargo, N.D., hotel ballroom. Paul spoke to people attending Republican party caucuses. (MPR Photo/Dan Gunderson) link to this photo

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Boston, MA, USA — Ellen and Chris Finlay, supporters of Republican presidential candidate, former Massachusetts Gov. Mitt Romney, dance and cheer as election results come in at Romney's Super Tuesday primary watch party in Boston, Tuesday, March 6, 2012. (AP Photo/Gerald Herbert) link to this photo

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Washington, DC, USA — Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, arrives to speak before the American Israel Public Affairs Committee (AIPAC), in Washington, Tuesday, March 6, 2012. (AP Photo/Charles Dharapak) link to this photo

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Columbus, OH, USA — Republican presidential candidate, former Massachusetts Gov. Mitt Romney, and his wife Ann, talk to reporters on his campaign plane before taking off for Boston, in Columbus, Ohio, Tuesday, March 6, 2012. (AP Photo/Gerald Herbert) link to this photo

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Huntsville, AL, USA — Republican presidential candidate, former House Speaker Newt Gingrich speaks at the U.S. Space and Rocket Center, Tuesday, March 6, 2012, in Huntsville, Ala. (AP Photo/Evan Vucci) link to this photo

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Atlanta, GA, USA — Republican presidential candidate, former House Speaker Newt Gingrich speaks during a Super Tuesday rally on Tuesday, March 6, 2012 in Atlanta. (AP Photo/Evan Vucci) link to this photo

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Boston, MA, USA — Republican presidential candidate, former Massachusetts Gov. Mitt Romney, talks to supporters at his election night party in Boston, Tuesday, March 6, 2012. (AP Photo/Gerald Herbert) link to this photo

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Steubenville, OH, USA — Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, center right, kisses his wife Karen before speaking to supporters at an election night party at Steubenville High School in Steubenville, Ohio, Tuesday, March 6, 2012. (AP Photo/Gene J. Puskar) link to this photo