Supporters of US President Barack Obama react as they watch a television screen during an election party at the US Embassy in central London on November 7, 2012.
- [/AFP/Getty Images]

WILDWOOD, MO - NOVEMBER 6: Missouri Senate candidate, Rep. Todd Akin (R-MO) and his wife, Lulli Akin, cast their ballots November 6, 2012 in Wildwood, Missouri. Akin is running against incumbent Sen. Claire McCaskill (D-MO). (Photo by Whitney Curtis/Getty Images)
- [Whitney Curtis/AFP/Getty Images]

People queue to cast their ballots at a polling station in Washington,DC on November 6, 2012. Americans head to the polls after a burst of last-minute campaigning by President Barack Obama and Mitt Romney in a nail-biting contest unlikely to heal a deeply polarized nation. After a long, expensive and fiercely negative campaign, voters will decide whether to re-elect Obama despite the plodding economy or hand the reins to Romney, who has vowed a return to prosperity through smaller government.
- [Nicholas Kamm/AFP/Getty Images]

GEORGETOWN, WI - NOVEMBER 6: Election Inspector Jim Nodorft unfurls the American flag to hang it up outside the Smelser Town hall as the polls opened at 7 a.m. on November 6, 2012 in Georgetown, Wisconsin. U.S. citizens go to the polls today to vote in the election between Democratic President Barack Obama and Republican nominee former Massachusetts Gov. Mitt Romney.
- [Mark Hirsch/AFP/Getty Images]

KANSAS CITY, MO - NOVEMEMBER 6: Sandy Hinson adjusts a sticker after casting her vote at Cleveland Avenue Baptist Church on November 5, 2012 in Kansas City, Missouri.(Photo by Julie Denesha/Getty Images)
- [Julie Denesha/AFP/Getty Images]

BELMONT, MA - NOVEMBER 06: Republican presidential candidate, former Massachusetts Gov. Mitt Romney (L) and his wife Ann Romney emerge from the Beech Street Center after casting their ballots at on November 6, 2012 in Belmont, Massachusetts. The race for the presidency remains tight as Americans are heading to the polls to cast their ballots. (Photo by Justin Sullivan/Getty Images)
- [Justin Sullivan/AFP/Getty Images]

Voters use floor space when booths were not available while filling out paper ballots at Tremont Elementary School during election day November 6, 2012 in Cleveland, Ohio. Citizens around the United States head to the polls to vote on the country's next president including in Ohio, a state with 18 electoral votes, were the race between US President Barack Obama and Mitt Romney is very close.
- [BRENDAN SMIALOWSKI/AFP/Getty Images]

ALEXANDRIA, VA - NOVEMBER 06: People enter Washington Mill Elementary School to cast their vote in the U.S. presidential race, on November 6, 2012, in Alexandria, Virginia. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race.
- [Patrick Smith/AFP/Getty Images]

JANESVILLE, WI - NOVEMBER 6: A nun waits in line with other citizens to cast their vote in the Presidential elections in Janesville WI November, 6, 2012. After what is being said is almost virtual tie between incumbent President Barack Obama and Republican challenger Mitt Romney citizens of the United States can finally cast their vote in 2012 elections to decide who will run the country for the next four years. (Photo by Darren Hauck/Getty Images)
- [Darren Hauck/AFP/Getty Images]

JANESVILLE, WI - NOVEMBER 6: Rachelle Elliott helps her daughter Raya (3) cast her vote in the Presidential elections in Janesville WI November, 6, 2012. After what is being said is almost virtual tie between incumbent President Barack Obama and Republican challenger Mitt Romney citizens of the United States can finally cast their vote in 2012 elections to decide who will run the country for the next four years. (Photo by Darren Hauck/Getty Images)
- [Darren Hauck/AFP/Getty Images]

WASHINGTON - NOVEMBER 6: People line up to cast their ballots at the Martin Luther King, Jr. Memorial Library on Tuesday, November 6, 2012 in Washington, DC. The latest polls continue to show a tight race between President Barack Obama and Republican challenger Mitt Romney. (Photo by Brendan Hoffman/Getty Images) *** Local Caption ***
- [Brendan Hoffman/AFP/Getty Images]