Vice President Joe Biden, left, and Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, shake hands following their the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin shake hands after the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan of Wisconsin answers a question during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, right, and Vice President Joe Biden discuss a point during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden listens to Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden makes his closing remarks during the vice presidential debate with Republican vice presidential nominee Rep. Paul Ryan of Wisconsin at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, listens to Vice President Joe Biden during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, right, watches as Vice President Joe Biden, speaks during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan of Wisconsin and Vice President Joe Biden pass each other after the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan of Wisconsin watches as Vice President Joe Biden answers a question during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, makes a point to Vice President Joe Biden during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden, left, and Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, respond to moderator Martha Raddatz during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden makes a point during the vice presidential debate with Republican vice presidential nominee Rep. Paul Ryan of Wisconsin at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, right, listens as Vice President Joe Biden speaks during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan of Wisconsin, right, listens to Vice President Joe Biden during the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden, center, and his wife Jill Biden, meet with Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., right, his wife Janna Ryan, left, and son Charlie Ryan, center, on stage after the vice presidential debate, at Centre College in Danville, Ky., Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, left, and his wife Janna, center, chat with Vice President Joe Biden's wife Jill following the vice presidential debate with Vice President Joe Biden at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, left, hugs his mother, Betty Douglas, as his wife Janna looks on following the vice presidential debate with Vice President Joe Biden at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden talks to Republican vice presidential nominee Rep. Paul Ryan of Wisconsin's mother Betty Douglas after the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Vice President Joe Biden, right, with Janna Ryan, left, wife of Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., after the vice presidential debate, at Centre College in Danville, Ky., Oct. 11, 2012, in Danville, Ky.
Republican vice presidential nominee Rep. Paul Ryan of Wisconsin greets his family, from left, son Sam, mother Betty Douglas, daughter Liza and wife Janna on stage after the vice presidential debate at Centre College, Oct. 11, 2012, in Danville, Ky.
Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., kisses his wife Janna Ryan, after the vice presidential debate, at Centre College, Oct. 11, 2012, in Danville, Ky.