Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets his vice presidential 

Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets his vice presidential running mate, Rep. Paul Ryan, R-Wis., at Port Columbus International Airport in Columbus, Ohio, Friday, Oct. 12, 2012. (AP Photo/Charles Dharapak)
Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets his vice presidential running mate, Rep. Paul Ryan, R-Wis., at Port Columbus International Airport in Columbus, Ohio, Friday, Oct. 12, 2012. (AP Photo/Charles Dharapak)
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