GOP presidential debate in Iowa (15 images)

Updated: Dec. 16, 2011 at 9:47 AM
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Republican 2012 presidential candidate and former House Speaker Newt Gingrich (R) responds to a question as former Massachusetts Gov. Mitt Romney listens during a GOP debate in Sioux City, Iowa, December 15, 2011, in advance of Iowa's first-in-the-nation caucuses, January 3, 2012. UPI/Mike Theiler
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