The Inauguration of Donald J. Trump

Donald Trump takes the oath of office in Washington, D.C., on Jan. 20, 2017.

U.S. Vice President Joe Biden left, speaks with U.S. President Barack Obama during the 58th presidential inauguration in Washington, D.C., on Jan. 20, 2017.

President-elect Donald Trump outside the U.S. Capitol in Washington, D.C., on Jan. 20, 2017.

Hillary Clinton and former U.S. President Bill Clinton arrive on the West Front of the U.S. Capitol on Jan. 20, 2017 in Washington, D.C.

Barron Trump arrives on the West Front of the U.S. Capitol on Jan. 20, 2017 in Washington, D.C.

Former President Bill Clinton, former Democratic presidential nominee Hillary Clinton and former President George W. Bush stand on the West Front of the U.S. Capitol on Jan. 20, 2017 in Washington, D.C.

President-elect Donald Trump and his wife Melania Trump are greeted by President Barack Obama and his wife first lady Michelle Obama, upon arriving at the White House in Washington, D.C., on Jan. 20, 2017.

Steve Bannon, chief strategist for U.S. President-elect Donald Trump, arrives for the 58th presidential inauguration in Washington, D.C., on Jan. 20, 2017. 

Former Speaker of the House Newt Gingrich, from left, his wife Callista Gingrich, former Speaker of the House John Boehner and his wife Deborah Boehner arrive for the presidential inauguration on Jan. 20, 2017.

A man wearing a sign reading "Really?" stands at the National Mall ahead of the 58th presidential inauguration in Washington, D.C., on Jan. 20, 2017. 

Attendees wear U.S. President-elect Donald Trump flags walk at the National Mall ahead of the 58th presidential inauguration in Washington, D.C., on Jan. 20, 2017.

President-elect Donald J. Trump and wife Melania Trump arrive for the inaugural concert at the Lincoln Memorial in Washington, D.C., on Jan. 19, 2017.

People attend the "Make America Great Again" Welcome Celebration concert at the Lincoln Memorial in Washington, D.C., on Thursday, Jan. 19, 2017. 

Visitors walk through the National Mall in Washington, D.C., on Thursday, Jan. 19, 2017. 

"The President's Own" United States Marine Band rehearses ahead of the presidential inauguration in Washington on Thursday, Jan. 19, 2017. 

A vendor sells U.S. President-elect Donald Trump flags while standing in front of Trump International Hotel in Washington on Thursday, Jan. 19, 2017. 

Visitors wait for the departure of President-elect Donald Trump, not pictured, outside of Trump International Hotel in Washington, D.C., on Thursday, Jan. 19, 2017. 

People wait for the arrival of President-elect Donald Trump, not pictured, outside of Trump International Hotel in Washington, D.C., on Thursday, Jan. 19, 2017. 

Empty chairs sit ahead of the 58th presidential inauguration in Washington, D.C., on Friday, Jan. 20, 2017.

Donald Trump supporters drive through downtown in Washington, D.C., on Jan. 19, 2017.

U.S. President-elect Donald Trump and his wife Melania arrive at Joint Base Andrews outside Washington, D.C., on Thursday, Jan. 19, 2017. 

Fireworks explode following an inauguration celebration for President-elect Donald Trump at the Lincoln Memorial in Washington, D.C., on Jan. 19, 2017.

Workers prepare the stage in front of the Lincoln Memorial to be used in the presidential inauguration festivities in Washington, D.C., on Jan. 13, 2017.