Obama, for the first time met Trump in the Oval Office of the White House, a day after he won the general election.
'The President, about to be caught in Spider-Man's web as he greets Nicholas Tamarin, 3, just outside the Oval Office. Spider-Man had been trick-or-treating for an early Halloween with his father, White House aide Nate Tamarin in the Eisenhower Executive Office Building,' said Photographer Pete Souza while capturing the moment on on October 26, 2012.
Photographer Pete Souza: 'We had just arrived at the helicopter landing zone in Chicago and instead of walking right to the motorcade, the President and First Lady walked past their vehicle to the edge of Lake Michigan to view the skyline of their home town.' Photo taken on June 15, 2012.
President Obama reacts after realizing he dialed the wrong number while making calls from a local campaign field office during a unscheduled visit in Orlando, Florida, on October 28, 2012.
Barack and Michelle Obama tour the Christ the Redeemer statue in Rio de Janeiro, Brazil, with their daughters Sasha and Malia, on March 19, 2011.
US President Barack Obama and First Lady Michelle Obama dance at the Commander-In-Chief Inaugural Ball in Washington, Jan. 21, 2013.
As Trip Director Marvin Nicholson tries to weigh himself, President Obama puts his toe on the scale during a hold in the volleyball locker room at the University of Texas in Austin, Texas, on August 9, 2010.
Barack and Michelle Obama dance together during the Governors Ball in the East Room of the White House, on February 21, 2010.
President Obama fist-bumps custodian Lawrence Lipscomb in the Eisenhower Executive Office Building following the opening session of the White House Forum on Jobs and Economic Growth, on December 3, 2009.
Aboard Air Force One en route to Singapore, President Obama laughs with aides on November 14, 2009.
Obama sits on the steps of the U.S. Ambassador's residence in Paris before returning to Washington, District of Columbia, on June 7, 2009.
Barack Obama places a rose in front of the gate building at the Buchenwald concentration camp near Weimar, Germany, on June 5, 2009.
Obama receives a standing ovation before speaking at Cairo University in Cairo, Egypt, on June 4, 2009. In his speech,President Obama called for a \"new beginning between the United States and Muslims\", declaring that 'this cycle of suspicion and discord must end'.
Barack Obama walks on the South Lawn of the White House, on June 25, 2009.
US presidential race: President Barack Obama hugs Democratic Presidential candidate Hillary Clinton after addressing the delegates during the third day session of the Democratic National Convention in Philadelphia, on July 27, 2016.
President Barack Obama jokes backstage with Jimmy Fallon before filming The Tonight Show with Jimmy Fallon in New York, N.Y., June 8, 2016.
Barack Obama and his wife Michelle flew to Queen Elizabeth's castle to wish happy birthday to the world's oldest monarch a day after she turned 90, where he met the younger generation of British royals - Prince George, who appeared ready for bed in pyjamas and a robe.