President Barack Obama at the election night party at McCormick Place in Chicago, on November 7, 2012. Obama defeated Republican challenger former Massachusetts Governor Mitt Romney in both the electoral vote and the popular vote. #

Indian students react to results on television networks during an event organized by the U.S. embassy at the landmark Imperial Hotel in New Delhi, India, on November 7, 2012. #

South Koreans watch an election board in Seoul, South Korea, on November 7, 2012. South Koreans and Americans have been paying close attention to the U.S. presidential race between U.S. President Barack Obama and Republican presidential candidate, former Massachusetts Gov. Mitt Romney. #

Romney supporter Merav Bader reacts as a state is called for President Barack Obama at an election night watch party at The Venetian in Las Vegas, Nevada, on November 6, 2012. #

A cell phone, held front of a computer screen, displays Barack Obama's tweet in Paris, France, after his re-election as US president on November 7, 2012. Barack Obama brought his sophisticated social media campaign to an emotional climax, proclaiming his victory on Twitter and Facebook just as TV networks were breaking the news. The post was his most re-tweeted -- 472,000 shares in three hours -- according to Twitter's politics account @gov. It was also the most popular ever, topping a message from singer Justin Bieber, website BuzzFeed said. #

Supporters of Barack Obama, Shauna Harry, left, and Alana Hearn, celebrate by leaping in the air at New York State Democratic Headquarters following Election Day, Tuesday, November 6, 2012. #

Butchers wash the sign of the butchery named "Maison Blanche" (White House), bearing a picture of Barack Obama in Port Bouet, a neighborhood in Abidjan, Ivory Coast, on November 7, 2012, in celebration of the re-election of US President Barack Obama. The sign reads "Welcome to the White House." #

Jon "Captain America" Angell salutes as Republican Presidential candidate Mitt Romney concedes the election to Democratic Presidential candidate Barack Obama at the Minnesota Republican election headquarters, on November 6, 2012, in Bloomington, Minnesota. #

Muslim students pose before a throng of photographers shortly after "voting" in a mock U.S. election at a shopping mall at suburban Quezon city, northeast of Manila, Philippines, on November 7, 2012. Filipinos participated in a mock U.S. elections between President Barack Obama and Republican challenger Mitt Romney which was organized by the U.S. Embassy in Manila. #

An American supporter of President Barack Obama, during a screening of U.S. election coverage organized at a restaurant over breakfast in Bangalore, India, on November 7, 2012. #

Spectators react to the election results displayed on large televisions during Mitt Romney's campaign election night event at the Boston Convention & Exhibition Center in Boston, Massachusetts, on November 6, 2012. #

Republican presidential nominee Mitt Romney hugs Janna Ryan as his wife Ann Romney and Republican vice presidential candidate Paul Ryan look on, during his election night rally in Boston, on November 7, 2012. #

Nancy French, from Columbia, Tennessee, watches vote results displayed on a television screen during Mitt Romney's election night rally, on November 6, 2012, in Boston. #

Republican vice presidential candidate Paul Ryan, daughter, Liza Ryan, and wife, Janna Ryan embrace each other after Mitt Romney conceded the presidency at an election night event in Boston, on November 7, 2012. #

Indian sand artist Sudaran Pattnaik gives the final touches to his sand sculpture of re-elected US President Barack Obama at Golden Sea beach in Puri, about 65 kilometers from Bhubaneswar, on November 7, 2012. #

Students hold a poster of US President Barack Obama as they watch the US election vote counting at SDN 01 Menteng elementary school where Obama studied in Jakarta, Indonesia, on November 7, 2012. Obama attended the school when he was a child while living in the Southeast Asian nation. #

People pose with a cutout of President Barack Obama during the Election Night Party following the U.S. Presidential Election, at the Intercontinental Hotel in Madrid, Spain, on November 7, 2012. #

U.S. President Barack Obama celebrates with his wife Michelle, his Vice President Joe Biden and Biden's wife Jill, after winning the U.S. presidential election in Chicago, on November 7, 2012. #

Supporters of President Barack Obama listen to his accpetance speech during a celebration at Grand Park after Obama was re-elected, in Los Angeles, California, on November 6, 2012. #