Slide Show: Trump takes oath
President-elect Donald Trump and President Barack Obama arrive for Trump's inauguration ceremony at the Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/J. Scott Applewhite, Pool)
President Donald Trump takes the oath of office from Chief Justice John Roberts, as his wife Melania holds the bible, and with his children Barron, Ivanka, Eric and Tiffany, Friday, Jan. 27, 2017 on Capitol Hill in Washington. (Jim Bourg/Pool Photo via AP)
President Donald Trump hugs his family after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Carolyn Kaster)
President Donald Trump delivers his inaugural address after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Patrick Semansky)
President Donald Trump thanks former President Barack Obama during the presidential inauguration on Capitol Hill in Washington, Friday, Jan. 20, 2017. (Saul Loeb/Pool Photo via AP)
President Donald Trump delivers his inaugural address after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Patrick Semansky)
Vice President Mike Pence, left, applauds as President Donald Trump waves after delivering his inaugural address after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Patrick Semansky)
President Barack Obama shake hands with President-elect Donald Trump during the Presidential Inauguration at the US Capitol in Washington, DC, on January 20, 2017. / AFP PHOTO / POOL / SAUL LOEB
Former President Barack Obama waves as he departs the East Front of the U.S. Capitol, Friday, Jan. 20, 2017 in Washington after the inauguration of President Donald Trump. (AP Photo/Alex Brandon)
President-elect Donald Trump and President Barack Obama arrive for Trump's inauguration ceremony at the Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/J. Scott Applewhite, Pool)
President Donald Trump takes the oath of office from Chief Justice John Roberts, as his wife Melania holds the bible, and with his children Barron, Ivanka, Eric and Tiffany, Friday, Jan. 27, 2017 on Capitol Hill in Washington. (Jim Bourg/Pool Photo via AP)
President Donald Trump hugs his family after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Carolyn Kaster)
President Donald Trump delivers his inaugural address after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Patrick Semansky)
President Donald Trump thanks former President Barack Obama during the presidential inauguration on Capitol Hill in Washington, Friday, Jan. 20, 2017. (Saul Loeb/Pool Photo via AP)
President Donald Trump delivers his inaugural address after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Patrick Semansky)
Vice President Mike Pence, left, applauds as President Donald Trump waves after delivering his inaugural address after being sworn in as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington, Friday, Jan. 20, 2017. (AP Photo/Patrick Semansky)
President Barack Obama shake hands with President-elect Donald Trump during the Presidential Inauguration at the US Capitol in Washington, DC, on January 20, 2017. / AFP PHOTO / POOL / SAUL LOEB
Former President Barack Obama waves as he departs the East Front of the U.S. Capitol, Friday, Jan. 20, 2017 in Washington after the inauguration of President Donald Trump. (AP Photo/Alex Brandon)