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Republican presidential candidate, former Massachusetts Gov. Mitt Romney stands with his wife Ann, after delivering a speech to the Republican National Convention on Thursday, Aug. 30, 2012 in Tampa, Fla. (AP Photo/Evan Vucci)

Republican presidential candidate, former Massachusetts Gov. Mitt Romney stands with his wife Ann, after delivering a speech to the Republican National Convention on Thursday, Aug. 30, 2012 in Tampa, Fla. (AP Photo/Evan Vucci)

Mitt Romney

Yahoo News

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