President Obama visits the Community Children's Center in Lawrence, Kan.– one of the nation's oldest Head Start providers. (Official White House Photo by Pete Souza)Audience members listen to President Obama as he delivers remarks at a rally on health insurance reform at the Comcast Center, University of Maryland in College Park, Md., Sept. 17, 2009.
President Obama bends over so the son of a White House staff member can pat his head during a family visit to the Oval Office May 8, 2009.
The White House lit with the colors of the rainbow in celebration of the Supreme Court ruling on same-sex marriage, June 26, 2015. (Official White House Photo by Pete Souza)
President Obama and the First Lady join hands with Rep. John Lewis, D-Ga. as they lead the walk across the Edmund Pettus Bridge to commemorate the 50th Anniversary of Bloody Sunday.
U.S. Army Ranger Sergeant First Class Cory Remsburg and his father Craig Remsburg greets President Obama at Cory's newly finished home in Gilbert, Ariz., March 13, 2015.A soldier hugs the President as he greeted U.S. troops at Bagram Air Field in Afghanistan. (Official White House Photo by Pete Souza)Following the mass shooting at a church in Charleston, S.C., that claimed nine lives, the President pauses while giving the eulogy at the funeral of one of the victims, Reverend Clementa Pinckney.
President Obama fist-bumps the robotic arm of Nathan Copeland during a tour at the White House Frontiers Conference at the University of Pittsburgh in Pittsburgh, Pa., Oct. 13, 2016.President Obama fist-bumps a medical professional in the Green Room of the White House, prior to a health care event, March 3, 2010. (Official White House Photo by Pete Souza)