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   Barack Obama, Barack Obama

   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)

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President Barack Obama waves to the audience at Dobson High School in Mesa. Feb. 18, 2009.

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President Barack Obama talks to student during a visit to Advance Placement History Class with Austrian Prime Minister Julia Gillard at Wakefield High School, Monday March, 7, 2011, in Arlington, Va. Above Obama are portraits of previous U.S. Presidents.

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President Barack Obama is interviewed by The Associated Press, Friday, April 15, 2011, in Chicago. (AP Photo/Pablo Martinez Monsivais)

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FILE - In this May 2, 2011 file photo, President Barack Obama speaks in the East Room of the White House in Washington. President Barack Obama is making his first trip as president to the U.S.-Mexico border, using the setting to sharpen his call for a remake of the nation's immigration laws and try to cast the GOP as the obstacle standing in its way. (AP Photo/Charles Dharapak, File)

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President Barack Obama wipes his eye as he talks about the Connecticut elementary school shooting, Friday, Dec. 14, 2012, in the White House briefing room in Washington. (AP Photo/Carolyn Kaster)

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A boy waves as President Barack Obama speak at the Cesar E. Chavez National Monument, Monday, Oct. 8, 2012, in Keene, Calif. (AP Photo/Carolyn Kaster)

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President Barack Obama speaks at the Cesar E. Chavez National Monument, Monday, Oct. 8, 2012, in Keene, Calif. (AP Photo/Carolyn Kaster)

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President Barack Obama speaks at the Cesar E. Chavez National Monument, Monday, Oct. 8, 2012, in Keene, Calif. (AP Photo/Carolyn Kaster)

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President Barack Obama waves to supporters after speaking at a campaign event, Sunday, Sept. 9, 2012, in Melbourne, Fla. (AP Photo/John Raoux)

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President Barack Obama addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/J. Scott Applewhite)

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President Barack Obama, left, greets patrons during an unscheduled stop at the Buff Restaurant, Sunday, Sept. 2, 2012, in Boulder, Colo. (AP Photo/Pablo Martinez Monsivais)

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President Barack Obama campaigns Saturday, Aug. 18, 2012, in Windham, N.H., at Windham High School. (AP Photo/Carolyn Kaster)

Barack Obama

FILE - In this June 21, 2012 file photo, President Barack Obama speaks in the East Room of the White House in Washington. President Barack Obama and Republican Mitt Romney say the Supreme Court’s decision last week upholding the president’s health care law gives them each advantages in the roughly dozen of states they are contesting most aggressively. Obama’s team says the decision has swelled the ranks -- by the thousands -- of campaign volunteers in states he won in 2008 and hopes to again to seal his re-election. Romney is claiming success using the ruling as a fundraising tool, saying thousands of small contributions have poured in from across the battleground map as the law’s opponents have seized on Romney as a last hope to repeal it. Both say the groundswell is on their side, and could make the difference in winning and losing. (AP Photo/Carolyn Kaster, File)

Barack Obama

FILE - In this June 21, 2012 file photo, President Barack Obama speaks in the East Room of the White House in Washington. President Barack Obama and Republican Mitt Romney say the Supreme Court’s decision last week upholding the president’s health care law gives them each advantages in the roughly dozen of states they are contesting most aggressively. Obama’s team says the decision has swelled the ranks -- by the thousands -- of campaign volunteers in states he won in 2008 and hopes to again to seal his re-election. Romney is claiming success using the ruling as a fundraising tool, saying thousands of small contributions have poured in from across the battleground map as the law’s opponents have seized on Romney as a last hope to repeal it. Both say the groundswell is on their side, and could make the difference in winning and losing. (AP Photo/Carolyn Kaster, File)

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President Barack Obama waves while boarding Air Force One before leaving O'Hare International Airport in Chicago, June 17, 2012. (AP Photo/Paul Beaty)

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President Barack Obama waves as he boards Air Force One at Andrews Air Force Base, Md., Monday, Oct. 24, 2012. (AP Photo/Cliff Owen)

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President Barack Obama gestures during a news conference in the East Room of the White House in Washington, Thursday, Oct. 6, 2011. (AP Photo/Susan Walsh)

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President Barack Obama gestures while speaking in the Rose Garden of the White House in Washington, Monday, Sept. 19, 2011. (AP Photo/Susan Walsh)

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President Barack Obama holds the American Jobs Act as he speaks at North Carolina State University in Raleigh, N.C., Wednesday, Sept. 14, 2011. (AP Photo/Gerry Broome)

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President Barack Obama delivers a statement in the Rose Garden of the White House in Washington, Tuesday, Aug. 2, 2011, following the Senate's passing of the debt ceiling agreement. (AP Photo/Carolyn Kaster)

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President Barack Obama delivers a statement in the Rose Garden of the White House in Washington, Tuesday, Aug. 2, 2011, following the Senate's passing of the debt ceiling agreement. (AP Photo/Carolyn Kaster)

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President Barack Obama addresses the nation from the East Room of the White House in Washington, Monday, July 25, 2011, on the approaching debt limit deadline. (AP Photo/Jim Watson, Pool)

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President Barack Obama during his Town Hall at the Ritchie Coliseum on the campus of University of Maryland, Friday, July 22, 2011 in College Park, Md. (AP Photo/Pablo Martinez Monsivais)

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President Barack Obama discusses the continuing budget talks, Tuesday, July 19, 2011, in the the briefing room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)