Republican presidential candidate and former Massachusetts Gov. Mitt Romney boards his campaign plane in Moline, Ill., as he travels to Dayton, Ohio, Monday, Oct. 29, 2012. (AP Photo/Ch

 

              Republican presidential candidate and former Massachusetts Gov. Mitt Romney boards his campaign plane in Moline, Ill., as he travels to Dayton, Ohio, Monday, Oct. 29, 2012. (AP Photo/Ch
Republican presidential candidate and former Massachusetts Gov. Mitt Romney boards his campaign plane in Moline, Ill., as he travels to Dayton, Ohio, Monday, Oct. 29, 2012. (AP Photo/Charles Dharapak)