Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop at the Koch Family Farm, Tuesday, Oct. 9, 2012, in Van Meter, Iowa. (AP Photo/Char

 

              Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop at the Koch Family Farm, Tuesday, Oct. 9, 2012, in Van Meter, Iowa. (AP Photo/Char
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop at the Koch Family Farm, Tuesday, Oct. 9, 2012, in Van Meter, Iowa. (AP Photo/Charlie Neibergall)