WE THE PEOPLE

President Barack Obama waves to the crowd after arriving on the White House South Lawn aboard Marine One following a trip to Pennsylvania and Ohio, Oct. 14, 2016. (Official White House Photo by Pete Souza)

President Barack 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. For the first time ever in humans a technology that allowed Copeland to experience the sensation of touch through a robotic arm that he controls with his brain. (Official White House Photo by Pete Souza)

Roxana Giron hugs President Barack Obama in the Green Room of the White House prior to walking in to the East Room to introduce the President for a Hispanic Heritage Month reception, Oct. 12, 2016. (Official White House Photo by Pete Souza)

First Lady Michelle Obama, in celebration of International Day of the Girl and Let Girls Learn, speaks to a group of girls from Morocco and Liberia in the State Dining Room, prior to a screening with the U.S. Department of State’s Office of Global Women’s Issues, of the new CNN Film “We Will Rise: Michelle Obama’s Mission to Educate Girls Around the World,” in the East Room of the White House, Oct. 11, 2016. The First Lady visited with the girls earlier this year on a trip to their countries. (Official White House Photo by Amanda Lucidon)