Trump and Biden face off in final presidential debate

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Democratic presidential nominee Joe Biden speaks during the final 2020 U.S. presidential campaign debate with U.S. President Donald Trump, in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

First lady Melania Trump arrives prior to the start of the second 2020 presidential campaign debate between U.S. President Donald Trump and Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump and Democratic presidential nominee Joe Biden are reflected in the plexiglass protecting a tv camera operator from covid as they participate in their second 2020 presidential campaign debate at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic presidential nominee Joe Biden speaks during the final 2020 U.S. presidential campaign debate in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic presidential nominee Joe Biden participates in the final 2020 U.S. presidential campaign debate with U.S. President Donald Trump, in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic presidential nominee Joe Biden checks his watch during the final presidential debate against U.S. President Donald Trump at Belmont University in Nashville, Tennessee, U.S., October 22, 2020. Chip Somodevilla/Pool via REUTERS

Debate moderator Kristen Welker is seated during the second 2020 presidential campaign debate between U.S. President Donald Trump and Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Tony Bobulinski, a former business associate of Hunter Biden, golfer John Daly, Lee Greenwood and Kid Rock are seen before the second 2020 presidential campaign debate between U.S. President Donald Trump and Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic U.S. presidential nominee Joe Biden speaks during the third and final presidential debate with U.S. President Donald Trump at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic presidential nominee Joe Biden looks on during the final 2020 U.S. presidential campaign debate in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump speaks during the final 2020 U.S. presidential campaign debate with Democratic presidential nominee Joe Biden, in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Kristen Welker of NBC News moderates the second 2020 presidential campaign debate between U.S. President Donald Trump and Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump participates in the second 2020 presidential campaign debate with Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic presidential nominee Joe Biden smiles during the final 2020 U.S. presidential campaign debate in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump and Democratic presidential nominee Joe Biden are joined on stage by first lady Melania Trump and by Dr. Jill Biden after the final 2020 presidential campaign debate at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Former UN ambassador from the U.S. Nikki Haley looks on ahead of the final 2020 U.S. presidential campaign debate between U.S. President Donald Trump and Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump speaks during the final 2020 U.S. presidential campaign debate in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump participates in the final 2020 U.S. presidential campaign debate with Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump speaks during the third and final presidential debate with Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump speaks during the final 2020 U.S. presidential campaign debate with Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

Democratic presidential candidate former Vice President Joe Biden hugs wife Jill Biden as U.S. President Donald Trump stands first lady Melania Trump after the second and final presidential debate at the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020. Morry Gash/Pool via REUTERS

U.S. President Donald Trump speaks during the third and final presidential debate with Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

White House Senior Adviser Ivanka Trump, Eric Trump, Eric Trump's wife Lara Trump, Donald Trump Jr's girlfriend Kimberly Guilfoyle and Tiffany Trump arrive for the second 2020 presidential campaign debate between U.S. President Donald Trump and Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump speaks during the final 2020 U.S. presidential campaign debate in the Curb Event Center at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.

U.S. President Donald Trump reacts during the third and final presidential debate with Democratic presidential nominee Joe Biden at Belmont University in Nashville, Tennessee, U.S., October 22, 2020.