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Republican Presidential Debate, Mesa, Ariz., Feb. 22, 2012
Credit: AFP/Getty Images
Republican presidential candidate Rick Santorum waves as he arrives to the debate hall on February 22, 2012 in Mesa, Arizona. The Arizona and Michigan primaries are scheduled to be held February 28. AFP PHOTO/DON EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
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