2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) participate in the vice presidential debate as moderator Martha Raddatz looks on at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: Janna Biden (C)speaks with Jill Biden (R) as U.S. Vice President Joe Biden and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) look on after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Alex Wong/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: Janna Ryan (L), wife of Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) and his mother Betty Douglas (R) applaud before the vice presidential debate at Centre College on October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Michael Reynolds-Pool/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) shakes hands with Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Rep. Paul Ryan (R-WI) speaks during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden listens during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) participate in the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Justin Sullivan/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden speaks during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Alex Wong/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (C) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) shake hands with moderator Martha Raddatz during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Alex Wong/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) shakes hands with Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) shakes hands with Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Rep. Paul Ryan (R-WI) speaks during the vice presidential debate as moderator Martha Raddatz looks on at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) participate in the vice presidential debate at Centre College on October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Rick Wilking-Pool/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (R) speaks as Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (L) and moderator Martha Raddatz listen during the vice presidential debate at Centre College on October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Michael Reynolds-Pool/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden smiles during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) meets with family after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Justin Sullivan/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (R) greets Republican vice presidential candidate U.S. Rep. Paul Ryan's (R-WI) wife Janna Ryan at the end of the vice presidential debate at Centre College on October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Michael Reynolds-Pool/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: Janna Ryan (L), U.S. Vice President Joe Biden, Jill Biden and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) and their families talk on stage after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) greet people at the end of the vice presidential debate at Centre College on October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Michael Reynolds-Pool/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) meets with family after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) meets with family after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden meets with family after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Alex Wong/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) participate in the vice presidential debate as moderator Martha Raddatz looks on at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Rep. Paul Ryan (R-WI) speaks during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Justin Sullivan/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (C) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) participate in the vice presidential debate as moderator Martha Raddatz (L) looks on at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Alex Wong/Getty Images)

2012 Vice Presidential Debate

DANVILLE, KY - OCTOBER 11: U.S. Vice President Joe Biden (L), Jill Biden (C) and Republican vice presidential candidate U.S. Rep. Paul Ryan (R-WI) (R) speak after the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Win McNamee/Getty Images)