Photos: Presidential debate between Donald Trump, Hillary Clinton

Democratic presidential candidate Hillary Clinton and US Republican presidential candidate Donald Trump shakes hands after the second presidential debate at Washington University in St. Louis, Missouri, on October 9, 2016.

Republican presidential nominee Donald Trump (L) speaks as Democratic presidential nominee former Secretary of State Hillary Clinton looks on during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri.

Republican Presidential nominee Donald Trump participates in a town hall debate at Washington University in St. Louis, Missouri, on October 9, 2016.

Democratic presidential nominee former Secretary of State Hillary Clinton responds to a question during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri.

Republican presidential nominee Donald Trump listens to Democratic presidential nominee Hillary Clinton during the second presidential debate at Washington University in St. Louis, Sunday, Oct. 9, 2016.

Republican presidential nominee Donald Trump stands next to Democratic presidential nominee Hillary Clinton during the second presidential debate at Washington University in St. Louis, Sunday, Oct. 9, 2016.

Melania Trump, wife of Donald Trump passes former President Bill Clinton before the second presidential debate at Washington University in St. Louis, Sunday, Oct. 9, 2016.

From left, Kathleen Willey, Juanita Broaddrick and Kathy Shelton wait for the second presidential debate between Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton at Washington University in St. Louis, Sunday, Oct. 9, 2016.

Moderator Anderson Cooper of CNN (L) and moderator Martha Raddatz of ABC stand before the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri.

TV producers and officials prepare thestage for the second presidential debate at Washington University in St. Louis, Missouri on October 9, 2016.

Republican presidential candidate Donald Trump, second from left, make remarks before the second presidential debate with Democratic presidential candidate Hillary Clinton, Sunday, Oct. 9, 2016, in St. Louis. From right, Paula Jones, Kathy Shelton, Trump, and Juanita Broaddrick.

Jan Mazur of Cincinnati holds a sign before the town hall debate at Washington University on Oct. 9, 2016, in St Louis, Missouri.

Student Breckan Erdman carries around a sign on the campus of Washington University in St, Louis, Missouri where the second presidential debate will be held between Republican nominee Donald Trump and his Democrat counterpart Hillary Clinton.

Democratic presidential candidate Hillary Clinton arrives at Lambert-St. Louis International Airport in St. Louis on Oct. 9, 2016, for the second presidential debate.

Banners are seen in the media center prior to the second presidential debate between Hillary Clinton and Donald Trump at Washington University in St. Louis, Missouri, on Oct. 9, 2016.

Workers prepare the stage Oct. 7, 2016, for the second presidential debate at Washington University in St. Louis, Missouri.

Students stand in on the stage as preparations are made for the second presidential debate between Donald Trump and Hillary Clinton at Washington University in St. Louis on Oct. 8, 2016.

Workers prepare the stage for the second presidential debate between Donald Trump and Hillary Clinton at Washington University in St. Louis on Oct. 8, 2016.

Brookings Hall is lit up in a patriotic theme as preparations continue ahead of the second presidential debate at Washington University in St. Louis on Oct. 6, 2016.

A mock debate takes place during preparations for the second presidential debate at Washington University on Oct. 8, 2016, in St Louis, Missouri.

People walk by the debate site ahead of the second presidential debate at Washington University on Oct. 8, 2016, in St. Louis.

Workers prepare the debate site ahead of the second presidential debate at Washington University on Oct. 7, 2016, in St. Louis.

A worker installs carpet on the stage as preparations continue ahead of the second presidential debate at Washington University in St. Louis on Oct. 6, 2016.