Scenes From the Vice Presidential Debate — PICTURES

Vice President Joe Biden and Rep. Paul Ryan of Wisconsin shake hands after Thursday's vice presidential debate at Centre College in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

Biden and his wife, Jill Biden, meet with Ryan, his wife, Janna Ryan (left), and his son Charlie Ryan on stage after the debate. (AP Photo/Pablo Martinez Monsivais)

Ryan makes a point during the debate. ((AP Photo/Charlie Neibergall))

Biden speaks during the vice presidential debate with Ryan at Centre College on Thursday. ((AP Photo/David Goldman))

Ryan answers a question during the vice presidential debate. ((AP Photo/Charlie Neibergall))

Ryan watches as Biden answers a question during the debate. ((AP Photo/Pool-Rick Wilking))

Biden and Ryan participate in the vice presidential debate. ((AP Photo/Pool-Rick Wilking))

Biden and Paul Ryan exchange points in the vice presidential debate. ((AP Photo/Pool-Michael Reynolds))

Biden and Ryan are seen on stage together before the start of the vice presidential debate at Centre College. ((AP Photo/Pablo Martinez Monsivais))

Moderator Martha Raddatz (left) reaches across to greet Republican vice presidential candidate Paul Ryan as Vice President Joe Biden takes his seat for the start of the vice presidential debate. (AP Photo/Pablo Martinez Monsivais)

Jill Biden, wife of Vice President Joe Biden, waits for the start of the vice presidential debate. ((AP Photo/Pool-Michael Reynolds))

Janna Ryan, wife of Republican vice presidential nominee Paul Ryan, anticipates the start of the debate. ((AP Photo/Pool-Michael Reynolds))

Joe Biden and Paul Ryan shake hands before the vice presidential debate. ((AP Photo/Pool-Michael Reynolds))

Bert Christian of Louisville, Ky., carries a sign on Thursday in support of Vice President Joe Biden ahead of the debate. (AP Photo/David Goldman)

Campaign volunteer Hunt VanderToll wears a tie and button in support of the Republican Party and vice presidential candidate Paul Ryan. (AP Photo/David Goldman)

The "spin" corner for President Obama's campaign is seen in the media center at Centre College. (AP Photo/David Goldman)

Abraham Lincoln impersonator Larry Elliott of Louisville, Ky., poses with cutouts of Mitt Romney and President Obama outside the Norton Center on the Centre College campus before the vice presidential debate on Thursday. (AP Photo/Charlie Neibergall)

Ryan supporters wave signs during a rally outside the Norton Center on Thursday before the debate. (AP Photo/Charlie Neibergall)

A supporter holds a sign for Obama and Biden at Centre College before the debate. (AP Photo/Eric Gay)

Vice President Joe Biden, followed by his daughter Ashley Biden, arrives on Air Force Two at Lexington Blue Grass Airport on Thursday. (AP Photo/Pablo Martinez Monsivais)

Paul Ryan greets supporters as he arrives at the Blue Grass Airport in Lexington, Ky., on Wednesday. (AP Photo/Mary Altaffer)

Workers carry chairs through the media center at Centre College on Wednesday during preparations for Thursday's debate. (AP Photo/David Goldman)

Carpenter Damon Denney hangs a sign outside the Norton Center on Wednesday for Thursday night's vice presidential debate. (AP Photo/Charlie Neibergall)

Students posing as Vice President Joe Biden and his Republican challenger, Rep. Paul Ryan, walk onstage on Wednesday during set up for the debate. (AP Photo/Morry Gash)

The two vice presidential debate stand-ins shake hands. (AP Photo/Morry Gash)

A journalist works in the media center on Wednesday ahead of Thursday's vice presidential debate. (AP Photo/David Goldman)

A worker passes under a relief sculpture of Joe Biden (left) and Paul Ryan. (AP Photo/Eric Gay)