FILE - In this Oct. 3, 2012 file photo, Republican presidential nominee 

FILE - In this Oct. 3, 2012 file photo, Republican presidential nominee Mitt Romney and President Barack Obama shake hands after the first presidential debate at the University of Denver, in Denver. Both men relished the wonky talk, but Mitt Romney also showed the easy confidence a presidential contender needs _ and a bit of the salesman's dynamic presentation. Barack Obama sounded more like a long-winded professor a little annoyed he has to go over this stuff one more time for the slow students in the back. For viewers the lesson from both was clear: If they crave a real discussion of complicated issues _ not just zingers _ it means some tough going.  (AP Photo/Charlie Neibergall, File)
Associated Press
FILE - In this Oct. 3, 2012 file photo, Republican presidential nominee Mitt Romney and President Barack Obama shake hands after the first presidential debate at the University of Denver, in Denver. Both men relished the wonky talk, but Mitt Romney also showed the easy confidence a presidential contender needs _ and a bit of the salesman's dynamic presentation. Barack Obama sounded more like a long-winded professor a little annoyed he has to go over this stuff one more time for the slow students in the back. For viewers the lesson from both was clear: If they crave a real discussion of complicated issues _ not just zingers _ it means some tough going. (AP Photo/Charlie Neibergall, File)
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