US President Barack Obama mimics a mustache while joking about the hair styles of the 1970s during a ceremony in the East Room of the White House August 20, 2013 in Washington, DC. Obama was joined by members of the 1972 Miami Dolphins to celebrate the Super Bowl win against the Washington Redskins in 1973. AFP PHOTO/Brendan SMIALOWSKI
Upphovsman: BRENDAN SMIALOWSKI
President Barack Obama reflects during the National Peace Officers Memorial Service on May 15, 2015 at the US Capitol in Washington, DC. The ceremony, held since 1982, comes near the end of Police Week, a 53-year-old event first officially recognized in 1962 by President John F. Kennedy. The National Law Enforcement Officers Memorial Fund reported that 126 law enforcement officers died in the line of duty last year, compared with 102 in 2013.
US President Barack Obama pauses as he speaks before signing the Fair Pay and Safe Workplace executive order on July 31, 2014 in the South Court Auditorium of the Eisenhower Executive Office Building, next to the White House in Washington, DC. AFP PHOTO/Mandel NGAN
Upphovsman: MANDEL NGAN
US President Barack Obama speaks on infrastructure at the Port of Wilmington in Wilmington, Delaware, on July 17, 2014. President Barack Obama Thursday said the crash of a Malaysian airliner in eastern Ukraine was a 'terrible tragedy' and said US officials were trying to establish if any Americans were on board. 'The world is watching reports of a downed passenger jet near the Russia/Ukraine border. And it looks like it may be a terrible tragedy,' Obama said, before going ahead with the previously scheduled event in Wilmington, Delaware. AFP PHOTO/Jewel Samad
Upphovsman: JEWEL SAMAD
US President Barack Obama laughs as he listens performer Joel McHale telling jokes during the White House Correspondents Association Dinner on May 3, 2014 in Washington, DC. AFP PHOTO/Jewel Samad
Upphovsman: JEWEL SAMAD
U.S. President Barack Obama greets supporters as he arrives for a campaign rally at Fifth Third Arena on the campus of the University of Cincinnati November 4, 2012 in Cincinnati, Ohio. With only two days left in the presidential election, Obama and his opponent, former Massachusetts Gov. Mitt Romney are stumping from one 'swing state' to the next in a last-minute rush to persuade undecided voters.
Upphovsman: Chip Somodevilla
President Barack Obama tells supporters that he will return to shake their hands during a campaign rally at Springfield High School November 2, 2012 in Springfield, Ohio. With four days left until the general election, Obama and the Republican presidential nominee, former Massachusetts Gov. Mitt Romney, are racing from swing-state to swing-state in an attempt to change voters' minds at the last minute.