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U.S. Sen. Rob Portman (R-OH) (L) campaigns for Republican presidential candidate Mitt Romney (R) during a Sept. 25 rally September 25, 2012 at Dayton International Airport. (Getty Images)
U.S. Sen. Rob Portman (R-OH) (L) campaigns for Republican presidential candidate Mitt Romney (R) during a Sept. 25 rally September 25, 2012 at Dayton International Airport. (Getty Images)
