In this photo taken Oct. 12, 2012, Republican presidential candidate and former Massachusetts Gov. Mitt Romney and Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., campai

 

              In this photo taken Oct. 12, 2012, Republican presidential candidate and former Massachusetts Gov. Mitt Romney and Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., campai
In this photo taken Oct. 12, 2012, Republican presidential candidate and former Massachusetts Gov. Mitt Romney and Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., campaigns in Lancaster, Ohio. It's either candidate's race to win as Obama and Romney prepare to dig in for their second debate Tuesday night, Oct. 16, 2012, with just three weeks to go until the election and voting already well under way in many states. (AP Photo/Charles Dharapak)