Mitt Romney

Associated Press
FILE - In this Jan. 19, 2012 file photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney, is introduced by Sen. Rob Portman, R-Ohio, at his campaign headquarters in Charleston, S.C. Leaks are springing. Trial balloons are floating. Egos are being stroked. Wanna-bes are auditioning. And, chances are, lies are being told. Somewhere, amid all of the shenanigans, Republican Mitt Romney is considering his choices for a running mate, one of the most significant decisions of his presidential campaign.  (AP Photo/Charles Dharapak, File)

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

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