Barack Obama's final weeks in office

Obama walks along the colonnades of the White House on Jan. 20, 2017, before the start of presidential inaugural festivities for Donald Trump.

Obama kisses the first lady as they await for the arrival of President-elect Donald Trump and his wife, Melania, at the White House on Jan. 20, 2017.

Obama speaks during his final presidential news conference on Jan. 18, 2017, in the briefing room of the White House.

Obama recognizes White House press secretary Josh Earnest during Earnest's final press briefing on Jan. 17, 2017.

Obama talks with kids as they play on "Malia and Sasha's Castle," the playground that the Obamas donated to the Jobs Have Priority Naylor Road Family Shelter in Washington, on Jan. 16, 2017.

Obama holds up a personalized Chicago Cubs baseball jersey presented to him for a group photo during a ceremony in the East Room of the White House on Jan. 16, 2017, where the president honored the 2016 World Series Champion baseball team.

Obama paints a mural with the residents at the Jobs Have Priority Shelter in Washington on Jan. 16, 2017. The mural "Wall of Hope" was created by artist Omatayo Akinbolajo and features a painting of Martin Luther King Jr.

Biden laughs as Obama talks about him during a ceremony in the State Dining Room of the White House on Jan. 12, 2017. Obama surprised Biden and presented him with the Presidential Medal of Freedom.

Obama gives his farewell address at McCormick Place in Chicago on Jan. 10, 2017.

Obama arrives at Jacksonville International Airport on Jan. 7, 2017, in Jacksonville, Fla., to attend a staff member's wedding.

Obama is interviewed by Vox's Ezra Klein and Sarah Kliff at the Blair House in Washington on Jan. 6, 2017.

Obama receives a service medal from Secretary of Defense Ashton Carter during his Armed Forces Full Honor Review Farewell Ceremony at Joint Base Myers-Henderson Hall in Virginia on Jan. 4, 2017.

Obama arrives with House Minority Leader Nancy Pelosi, Senate Minority Leader Chuck Schumer and Rep. Joseph Crowley to attend a meeting with Democratic members of Congress on Capitol Hill on Jan. 4, 2017.

Obama and Biden meet with Combatant Commanders and members of the Joint Chiefs of Staff in the Cabinet Room of the White House on Jan. 4, 2017.

Obama arrives at Joint Base Pearl Harbor-Hickam, adjacent to Honolulu, Hawaii, to board Air Force One en route to Washington on Jan. 1, 2017, after his annual family vacation on the island of Oahu.

Obama and Japanese Prime Minister Shinzo Abe participate in a wreath-laying ceremony at the USS Arizona Memorial, part of the World War II Valor in the Pacific National Monument, in Joint Base Pearl Harbor-Hickam, Hawaii, on Dec. 27, 2016.

The president and first lady attend an event to thank service members and their families at Marine Corps Base Hawaii in Kaneohe Bay, Hawaii, on Dec. 25, 2016.

Obama greets people waiting for him outside Island Snow Hawaii in Kailua, Hawaii, on Dec. 24, 2016, after the president, joined by family and friends, had shave ice during the first family's annual vacation.

Obama pauses as he golfs on the 18th green at Kapolei Golf Club, in Kapolei, Hawaii, on Dec. 21, 2016.

The Obama family arrives on Air Force One on Dec. 16, 2016, at Joint Base Pearl Harbor-Hickam, adjacent to Honolulu, Hawaii, for their annual family vacation on the island of Oahu.

Obama answers questions during his year-end news conference in the Brady Press Briefing Room on Dec. 16, 2016.

The Obamas take part in a Hanukkah reception in the East Room of the White House on Dec. 14, 2016.

Obama speaks during the annual My Brother's Keeper event on Dec. 14, 2016, in Washington.

Obama embraces Biden after signing the 21st Century Cures Act on Dec. 13, 2016, in the South Court Auditorium in the Eisenhower Executive Office Building.

President Obama greets service members after speaking on counterterrorism at MacDill Air Force Base in Tampa on Dec. 6, 2016.

The Obamas attend the Kennedy Center Honors on Dec. 4, 2016, in Washington.

Obama shakes hands with United Nations Secretary-General-designate Antonio Guterres in the Oval Office on Dec. 2, 2016.

Obama speaks at the National Christmas Tree Lighting ceremony on the Ellipse on Dec. 1, 2016.

Obama meets with the 2016 American Nobel Prize laureates in the Oval Office on Nov. 30, 2016.

Obama walks to the Oval Office after arriving at the White House on Nov. 29, 2016.

Obama departs the White House for a round of golf at Joint Base Andrews on Nov. 25, 2016, in Washington.

Obama, with his nephews Aaron Robinson, front, and Austin Robinson and National Turkey Federation Chairman John Reicks, pardons the National Thanksgiving Turkey, Tot, on Nov. 23, 2016, during a ceremony in the Rose Garden.

The Obamas serve Thanksgiving dinner to residents at the Armed Forces Retirement Home on Nov. 23, 2016, in Washington.

Obama presents actress and comedian Ellen DeGeneres with the Presidential Medal of Freedom, the nation's highest civilian honor, during a ceremony honoring 21 recipients in the East Room of the White House on Nov. 22, 2016.

Obama salutes as he walks off Marine One on the South Lawn of the White House on Nov. 21, 2016, as he returned from his final trip to Europe as U.S. president.

Obama speaks during a press conference at the end of the Asia-Pacific Economic Cooperation Summit in Lima, Peru, on Nov. 20, 2016.

German Chancellor Angela Merkel welcomes Obama to Berlin on Nov. 18, 2016.

Obama speaks at a town hall with Young Leaders of the Americas Initiative in Lima, Peru, on Nov. 19, 2016.

Obama boards Air Force One during a refueling stop on Nov. 18, 2016, at Lajes Field in Praia da Vitoria on the Portuguese islands of Azores.

Obama walks with Professor Dimitrios Pandermalis, president of the Acropolis Museum, during a tour of the Acropolis Museum on Nov. 16, 2016, in Athens, Greece.

Obama answers questions from journalists during his first post-election press conference in the Brady Press Briefing Room at the White House on Nov. 14, 2016.

Obama participates in a wreath-laying ceremony at the Tomb of the Unknown Soldier at Arlington National Cemetery in Arlington, Va., to commemorate Veterans Day on Nov. 11, 2016.

Obama shakes hands with President-elect Donald Trump following a meeting in the Oval Office on Nov. 10, 2016.

Obama and Biden prepare to speak to the media about Donald Trump's victory over Hillary Clinton for the presidency in the Rose Garden on Nov. 9, 2016.

Obama and Clinton wave to the crowd during an election eve rally on Nov. 7, 2016, in Philadelphia.

Obama walks to greet well-wishers upon arrival in Portsmouth, N.H., on Nov. 7, 2016, to campaign for Hillary Clinton in nearby Durham.

Obama speaks at PNC Music Pavilion in Charlotte, N.C., on Nov. 4, 2016, during a Clinton campaign rally.

Obama waves as he walks to Marine One at the White House on Nov. 1, 2016, as he departs for Columbus, Ohio, to campaign for Hillary Clinton.

The president and first lady dance to the beat of Michael Jackson's "Thriller" as they welcome children from Washington area and children of military families to trick-or-treat at the White House on Halloween.

The president and first lady arrive at a BET event on the South Lawn of the White House on Oct. 21, 2016.

Obama and Jimmy Kimmel talk during the taping of "Jimmy Kimmel Live!" in Los Angeles on Oct. 24, 2016.

Obama meets with retired NASA astronaut Scott Kelly in the Oval Office on Oct. 21, 2016.

The Obamas wait to greet Italian Prime Minister Matteo Renzi and Italian First Lady Agnese Landini prior to the state dinner at the White House on Oct. 18, 2016.

Obama and Italian Prime Minister Matteo Renzi leave their joint news conference in the Rose Garden of the White House on Oct. 18, 2016.

Obama shakes hands with Benjamin Banneker Academic High School senior Ifunaya Azikiwe during his visit to the school in Washington on Oct. 17, 2016, where he highlighted the steady increase in graduation rates.

Obama speaks at the White House Frontiers Conference at the Jared L. Cohon Center on the campus of Carnegie Mellon University in Pittsburgh on Oct. 13, 2016.