Republican presidential candidate Mitt Romney (left) and President Obama participate in the first presidential debate at the University of Denver in Denver on Wednesday, Oct. 3, 2012. (AP Photo/Charlie Neibergall)

Photo by: Charlie Neibergall

Republican presidential candidate Mitt Romney (left) and President Obama participate in the first presidential debate at the University of Denver in Denver on Wednesday, Oct. 3, 2012. (AP Photo/Charlie Neibergall)