Photos:: Presidential debate in St. Louis

Donald Trump and Hillary Clinton speak during the second presidential debate.   (John Locher / Associated Press )

Donald Trump speaks.  (Win McNamee / Getty Images)

Democratic presidential nominee Hillary Clinton speaks to town hall participants following the second presidential debate.

Republican presidential nominee Donald Trump with sons Donald Trump Jr. and Eric Trump, right, after the second presidential debate.

Clinton staffer Huma Abedin greets Democratic presidential nominee Hillary Clinton after the debate.

A member of the audience asks a question during the town hall debate.

Hillary Clinton (R) and Donald Trump listen to a question.

Hillary Clinton and Donald Trump listen to a question during the town hall debate.

Donald Trump.

Hillary Clinton speaks.

Democratic nominee Hillary Clinton speaks during the presidential debate at Washington University.  (Robyn Beck / AFP / Getty Images)

Audience member James Carter asks a question during the debate.

Bill Clinton, right, and his daughter Chelsea and her husband Marc Mezvinsky listen to the debate.

Left to right: Republican presidential nominee Donald Trump’s wife Melania Trump, daughter Ivanka Trump, son Eric Trump and son Donald Trump, Jr. attend the town hall debate.

Democratic presidential nominee Hillary Clinton and Republican presidential nominee Donald Trump.

Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton.

An audience member asks a question during the town hall debate.

Paula Jones, Kathleen Willey and Juanita Broaddrick watch the town hall debate.

Hillary Clinton speaks during the town hall debate at Washington University.

Democratic presidential nominee Hillary Clinton, left, and Republican presidential nominee Donald Trump.

Republican presidential nominee Donald Trump speaks while Democratic presidential nominee Hillary Clinton takes notes.  (John Locher / Associated Press)

Republican presidential nominee Donald Trump speaks.

Hillary Clinton responds to a question.

Former President Bill Clinton with daughter Chelsea and her husband, Marc Mezvinsky, at Washington University in St. Louis before the second presidential debate between Hillary Clinton and Donald Trump.

Donald Trump.

Anderson Cooper, of CNN, and Martha Raddatz, of ABC News moderate the second presidential debate.

Democratic presidential nominee Hillary Clinton speaks during the second presidential debate at Washington University in St. Louis.

Democratic presidential nominee Hillary Clinton and Republican presidential nominee Donald Trump declined to shake hands before the town hall debate at Washington University in St. Louis.

Melania Trump greets former President Bill Clinton before the town hall debate at Washington University.

Donald Trump before the second debate with, from left, Kathleen Willey, Juanita Broaddrick, Kathy Shelton and Paula Jones.  (Evan Vucci / Associated Press)

Kathleen Willey, Juanita Broaddrick, Kathy Shelton, and a guest sit next to Republican presidential nominee Donald Trump’s daughters-in-law Lara Trump and Vanessa Trump and daughter Tiffany Trump during the town hall debate at Washington University.

Preparations are made before the town-hall debate at Washington University.

Hillary Clinton supporters rally before the candidates debate for a second time at Washington University in St. Louis.

Washington University student Anna Eddelbuettel of Chicago kicks at a likeness of Donald Trump before Sunday’s debate.

A boy wears a pro-Trump T-shirt at Washington University on Sunday.

Democratic presidential nominee Hillary Clinton arrives at the St. Louis airport Sunday.

The press center at Washington University before the debate.

A worker puts the finishing touches on the debate stage.

Students stand in for the debate participants prior the face-off between the presidential candidates.