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GOP presidential candidate Ron Paul holds "Rock the Caucus" campaign event with high school students in Des Moines,Iowa

Republican 2012 presidential candidate and Texas Rep. Ron Paul waits with his grandchildren to be introduced at a "Rock the Caucus" event at West Des Moines Valley High School, Iowa, January 3, 2012. Polls indicate a tight race between Paul, former Massachusetts Gov. Mitt Romney and former Pennsylvania Sen. Rick Santorum on the final day of Iowa's first-in-the-nation caucuses campaign. UPI/Mike Theiler

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