U.S. Vice President Joe Biden and Representative Paul Ryan

U.S. Vice President Joe Biden and Representative Paul Ryan

Scott Eells/Bloomberg

U.S. Vice President Joseph "Joe" Biden, left, gestures as Representative Paul Ryan, Republican vice presidential candidate looks on in front of moderator Martha Raddatz of ABC News, front, before the start of a debate in Danville, Kentucky, on Thursday, Oct. 11, 2012.