Mitt Romney, Republican presidential candidate, participates in a presidential debate with U.S. President Barack Obama, unseen, at the University of Denver in Denver, Colorado, on Wednesday, Oct. 3, 2012. Photographer: Andrew Harrer/Bloomberg
Mitt Romney, Republican presidential candidate, participates in a presidential debate with U.S. President Barack Obama, unseen, at the University of Denver in Denver, Colorado, on Wednesday, Oct. 3, 2012. Photographer: Andrew Harrer/Bloomberg
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