FILE - In this Oct. 12, 2012, file photo Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns in Lancaster, Ohio. It's either candidate's race to win as

 

              FILE - In this Oct. 12, 2012, file photo Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns in Lancaster, Ohio. It
FILE - In this Oct. 12, 2012, file photo Republican presidential candidate and former Massachusetts Gov. Mitt Romney 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, File)