Presidential debate 2012

President Obama and Mitt Romney greet audience members at Lynn University in Boca Raton, Fla., after the debate.  (Eric Gay / Associated Press)

First Lady Michelle Obama joins President Obama onstage after the debate.  (Saul Loeb / AFP/Getty Images)

Ann Romney joins her husband, Mitt, onstage after the debate.  (Saul Loeb / AFP/Getty Images)

First Lady Michelle Obama and Ann Romney join President Obama and Mitt Romney onstage after the debate.  (Joe Raedle / Getty Images)

Bob Schieffer, left, moderates the debate between Mitt Romney and President Obama.  (Marc Serota / Getty Images)

Republican presidential candidate Mitt Romney speaks during the debate.  (Mark Wilson / Getty Images)

President Obama makes a point during the debate.  (Marc Serota / Getty Images)

Mitt Romney and President Obama meet for their third presidential debate at Lynn University in Boca Raton, Fla.  (Joe Raedle / Getty Images)

Mitt Romney’s wife, Ann, and other family members wait for the debate to begin.  (Jewel Samad / AFP/Getty Images)

Mitt Romney and President Obama begin their third and final presidential debate at Lynn University in Boca Raton, Fla.  (Jewel Samad / AFP/Getty Images)

President Obama greets Republican challenger Mitt Romney before the debate, with moderator Bob Schieffer.  (Jewel Samad / AFP/Getty Images)

Moderator Bob Schieffer speaks to the crowd before the debate begins.  (Joe Raedle / Getty Images)

A police officer stands guard as members of the media work at a filing center at Lynn University in Boca Raton, Fla., ahead of the third and final presidential debate. Polls show President Obama and his Republican challenger, Mitt Romney, tied in the campaign.  (Jewel Samad / AFP/Getty Images)

Workers pose for a photo with a life-sized cutout of President Obama at Lynn University.  (Eric Gay / Associated Press)

AARP staff member Pete Jeffries calls for entrants at a debate party to take part in a game of bean bag toss.  (David Goldman / Associated Press)