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Republican presidential candidate, former Massachusetts Gov. Mitt Romney, left, and President Barack Obama, right, shake hands after debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver (Credit: Scout Tufankjian for Obama for America via Flickr)

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, left, and President Barack Obama, right, shake hands after debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver (Credit: Scout Tufankjian for Obama for America via Flickr)