Republican presidential nominee Mitt Romney and President Barack Obama shake hands before the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

John Rossitto watches the first presidential debate between President Barack Obama and Republican presidential nominee Mitt Romney from a restaurant in San Diego, Wednesday, Oct. 3, 2012. (AP Photo/Gregory Bull)

President Barack Obama, right, greets Republican presidential nominee Mitt Romney during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/David Goldman)

President Barack Obama shakes hands with Republican presidential nominee Mitt Romney during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

Republican presidential candidate, former Massachusetts Gov. Mitt Romney takes a photo with workers as he makes an unscheduled stop at a Chipotle restaurant in Denver, Tuesday, Oct. 2, 2012. (AP Photo/Charles Dharapak)

President Barack Obama and Republican presidential candidate and former Massachusetts Gov. Mitt Romney meet on stage at the start of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Republican presidential nominee Mitt Romney and President Barack Obama shake hands during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Republican presidential nominee Mitt Romney and President Barack Obama shake hands during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

President Barack Obama and Republican presidential nominee Mitt Romney participate in the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

President Barack Obama and Republican presidential nominee Mitt Romney participate in the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Michael Reynolds, Pool)

President Barack Obama and Republican presidential nominee Mitt Romney participate in the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

Republican presidential nominee Mitt Romney speaks during the first presidential debate with President Barack Obama at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/David Goldman)

President Barack Obama answers a question during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

Republican presidential nominee Mitt Romney and President Barack Obama wave to the audience during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Republican presidential nominee Mitt Romney and President Barack Obama wave to the audience during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

President Barack Obama and Republican presidential nominee Mitt Romney participate in the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool, Rick Wilking)

Ann Romney waves to the audience before the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Ann Romney wife of Republican presidential nominee Mitt Romney waits for first presidential debate to begin at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

First lady Michelle Obama greets Ann Romney before the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Former Massachusetts Gov. Mitt Romney is seated with Ann Romney as family members play a game of Zenga in the family holding room before the start of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Former Massachusetts Gov. Mitt Romney is seated with Ann Romney, as they watch their family play a game of Zenga in the family holding room before the start of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Republican presidential nominee Mitt Romney and with wife Ann wave toward the audience after the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Republican presidential nominee Mitt Romney and with wife Ann wave toward the audience after the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Republican presidential nominee Mitt Romney hugs his granddaughter as his wife Ann looks on during the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Republican presidential candidate and former Massachusetts Gov. Mitt Romney picks up granddaughter Chloe at the end of the first presidential debate with President Barack Obama in Denver, Wednesday, Oct. 3, 2012. Ann Romney is seen at right. (AP Photo/Charles Dharapak)

President Barack Obama, first lady Michelle Obama, Republican presidential candidate and former Massachusetts Gov. Mitt Romney, Ann Romney, and members of the Romney family talk on stage at the end of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Republican presidential nominee Mitt Romney hugs wife Ann Romney after the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Ed Andrieski)

Republican presidential candidate former Massachusetts Gov. Mitt Romney is seated with his wife Ann Romney as his son Craig and grandson Nick as they play a game of Jenga in the family holding room before the start of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Republican presidential candidate former Massachusetts Gov. Mitt Romney is seated with his wife Ann Romney as family members play a game of Jenga in the family holding room before the start of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Ann Romney, wife of Republican presidential nominee Mitt Romney arrives before the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Charlie Neibergall)

Republican presidential candidate and former Massachusetts Gov. Mitt Romney walks towards his wife Ann at the end of the first presidential debate with President Barack Obama in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

Ann Romney arrives before the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

Ann Romney waits for the start of the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

Republican presidential nominee Mitt Romney and wife Ann Romney acknowledge the crowd after the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool, Rick Wilking)

Ann Romney watches as Republican presidential nominee Mitt Romney hugs his son Tagg, right, following the first presidential debate with President Barack Obama at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/David Goldman)

Michelle Obama, left, greets Ann Romney before the first presidential debate between President Barack Obama and Republican presidential nominee Mitt Romney at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Eric Gay)

Ann Romney, right, hugs First lady Michelle Obama before the first presidential debate between President Barack Obama and Republican presidential nominee Mitt Romney at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/David Goldman)

Republican presidential candidate former Massachusetts Gov. Mitt Romney is seated with his wife Ann Romney, second left, son Josh, left, son Matt, second right, and son Craig, far right, as grandson Nick pulls out a block as they play a game of Zenga in the family holding room before the start of the first presidential debate in Denver, Wednesday, Oct. 3, 2012. (AP Photo/Charles Dharapak)

President Barack Obama and Republican presidential nominee Mitt Romney participate in shakes hands with Ann Romney after the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

First lady Michelle Obama waits for the start of the first presidential debate at the University of Denver, Wednesday, Oct. 3, 2012, in Denver. (AP Photo/Pool-Michael Reynolds)

DENVER, CO - OCTOBER 03: A debate spectator take photos with a smartphone of first lady Michelle Obama's chair prior to the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Chip Somodevilla/Getty Images)

DENVER, CO - OCTOBER 03: A debate spectator poses for a picture shot with a smartphone in first lady Michelle Obama's chair before the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Chip Somodevilla/Getty Images)

DENVER, CO - OCTOBER 03: Democratic presidential candidate, U.S. President Barack Obama (R) hugs his wife and First lady Michelle Obama after the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Chip Somodevilla/Getty Images)

DENVER, CO - OCTOBER 03: U.S. President Barack Obama (2nd-L) talks with first lady Michelle Obama, Ann Romney (R), and Matt Romney (C) after the conclusion of the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Rick Wilking-Pool/Getty Images)

DENVER, CO - OCTOBER 03: First lady Michelle Obama (C) sits with White House Senior Advisor Valerie Jarrett (R) before the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Michael Reynolds-Pool/Getty Images)

US President Barack Obama (R) and First Lady Michelle Obama leave the stage as Republican presidential candidate Mitt Romney (C) collects his papers after the first presidential debate at the university of Denver on October 3, 2012 in Denver, Colorado. AFP PHOTO/Jewel SamadJEWEL SAMAD/AFP/GettyImages

US President Barack Obama (R) and First Lady Michelle Obama leave the stage as Republican presidential candidate Mitt Romney (C) collects his papers after the first presidential debate at the university of Denver on October 3, 2012 in Denver, Colorado. AFP PHOTO/Jewel SamadJEWEL SAMAD/AFP/GettyImages

DENVER, CO - OCTOBER 03: Ann Romney (R) wife of Republican presidential candidate, former Massachusetts Gov. Mitt Romney (not pictured), and First lady Michelle Obama (L) hug prior to the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Win McNamee/Getty Images)

DENVER, CO - OCTOBER 03: Ann Romney (R) wife of Republican presidential candidate, former Massachusetts Gov. Mitt Romney (not pictured), and First lady Michelle Obama (L) hug prior to the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Win McNamee/Getty Images)

US First Lady Michelle Obama waves to the audience after being introduced before the start first presidential debate between her husband and Republican presidential candidate Mitt Romney on October 3, 2012 in Denver, Colorado. AFP PHOTO / Nicholas KAMMNICHOLAS KAMM/AFP/GettyImages

Ann Romney (R), wife of Republican presidential candidate Mitt Romney, hugs US First Lady Michelle Obama before the for the first presidential debate between their husbands on October 3, 2012 in Denver, Colorado. AFP PHOTO / Saul LOEBSAUL LOEB/AFP/GettyImages

Ann Romney (R), wife of Republican presidential candidate Mitt Romney, hugs US First Lady Michelle Obama before the first presidential debate between their husbands on October 3, 2012 in Denver, Colorado. AFP PHOTO / Saul LOEBSAUL LOEB/AFP/GettyImages

US First Lady Michelle Obama gestures prior to the debate between US President Barack Obama and Republican presidential candidate Mitt Romney at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. - After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEBSAUL LOEB/AFP/GettyImages

Ann Romney (R), wife of Republican presidential candidate Mitt Romney, hugs US First Lady Michelle Obama before the for the first presidential debate between their husbands on October 3, 2012 in Denver, Colorado. AFP PHOTO / Nicholas KAMMNICHOLAS KAMM/AFP/GettyImages

US First Lady Michelle Obama (2nd-L) listens as US President Barack Obama and Republican presidential candidate Mitt Romney participate in the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012, moderated by Jim Lehrer of the PBS NewsHour. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEBSAUL LOEB/AFP/GettyImages