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Republican presidential nominee Mitt Romney addresses delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charles Dharapak)

Republican presidential nominee Mitt Romney addresses delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charles Dharapak)

Mitt Romney

Yahoo News

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