Biden and Ryan square off in VP debate

Vice President Biden, left, Jill Biden and  Rep. Paul Ryan gather with their families  after the vice presidential debate.

Supporters of Republican vice presidential nominee  Paul Ryan gather at the Holiday Inn Express in Janesville, Wis. to watch his debate with Vice President Biden.

Vice President Joe Biden kisses his wife, Jill after his debate against Rep. Paul Ryan.

Republican vice presidential nominee Paul Ryan high fives his son Charlie after the vice presidential debate at Centre College in Danville, Ky.

A couple watches the vice presidential debate at Wok and Roll restaurant in Washington.

Vice President Biden, right, and Rep. Paul Ryan wrap up their only vice presidential debate.

Rep. Paul Ryan meets with family after the vice presidential debate at Centre College in Danville, Ky.

Vice President Biden and Republican vice presidential nominee Paul Ryan  shake hands after the vice presidential debate that could be characterized as much more confrontational than President Obama's and Mitt Romney's first debate.

Vice President Biden and Rep. Paul Ryan had heated exchanges over the economy and foreign policy.

Vice President Biden meets with Janna Ryan after the debate with her husband Rep. Paul Ryan.

Rep. Paul Ryan, R-Wis., and Vice President Biden speak passionately to each other as moderator Martha Raddatz listens.

Rep. Paul Ryan says the Obama administration has failed on the economy. "We're going in the wrong direction. ... The economy is barely limping along."

Vice President Biden, left, and Republican vice presidential candidate Paul Ryan engaged repeatedly on major issues including Medicare and Social Security.

Rep. Paul Ryan makes his point to Vice President Biden at their debate in Centre College, in Danville, Ky.

Republican vice presidential nominee Rep. Paul Ryan makes a point during the debate at Centre College in Ky.

Vice President Biden said the GOP ticket will keep loopholes for wealthy investors by taxing capital gains at lower rates than regular income.

Vice President Biden's and Rep. Paul Ryan's debate was seen by some as faster paced and more immersed in policy details than the first debate between their running mates.

Vice President Biden and Republican vice presidential candidate Paul Ryan debate each other at Centre College in Danville, Ky.

Republican vice presidential candidate Paul Ryan lays out the Mitt Romney-Ryan positions during the  debate in Kentucky.

Vice President Biden and Republican vice presidential nominee Rep. Paul Ryan have a lively exchange.

Vice President Joe Biden and Rep. Paul Ryan of spar over Medicare and the Afghanistan war during the vice presidential debate.

Vice President Joe Biden brought up Mitt Romney's remarks that 47% of Americans are "dependent on government."

U.S. Rep. Paul Ryan, R-Wis., listens to Vice President Biden during the debate.

Vice President Biden and moderator Martha Raddatz have an exchange during the vice presidential debate at Centre College in Danville, Ky.

Rep. Paul Ryan, R-Wis., makes his point to moderator Martha Raddatz during the only debate between the vice presidential candidates before the closely-contested election Nov. 6.

Rep. Paul Ryan of Wisconsin listens to Vice President Joe Biden, who says the Afghanistan withdrawal plan is an Obama administration success.

Vice President Biden defended the auto industry bailout during his debate with Republican vice presidential candidate Paul Ryan.

Vice President Biden, left, and Rep. Paul Ryan, R-Wis., get seated for their debate moderated by Martha Raddatz in Danville, Ky.

Vice President Joe Biden mocked Republican Mitt Romney's economic plan, calling it a giveaway for the rich.

The Republican vice presidential nominee, Rep. Paul Ryan, says the problems in Afghanistan are part of "the unraveling of the Obama foreign policy."

Vice President Joe Biden, left, and Rep. Paul Ryan greet each other as they make their way to the stage for their only debate before the election.

Debate moderator Martha Raddatz speaks on stage prior to the vice presidential debate at Centre College in Danville, Ky.

Vice President Biden and Rep. Paul Ryan get to their seats before a live audience at Centre College. Moderator Martha Raddatz is center.

Janna Ryan, wife of Republican vice presidential nominee Rep. Paul Ryan, waits for the start of the vice presidential debate.

A program for the vice presidential debate is shown in the debate hall at Centre College in Danville, Ky.