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Republican presidential candidate and former Massachusetts Gov. Mitt Romney, center, collaborates with senior adviser Kevin Madden, left, and chief strategist Stuart Stevens, right, during a strategy meeting on their campaign plane en route to Dayton International Airport in Vandalia, Ohio, Sunday, Oct. 28, 2012. (AP Photo/Charles Dharapak)

Mitt Romney

Highlights from Republican presidential nominee Mitt Romney's 2012 campaign trail.