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Republican presidential nominee Donald Trump (L), Democratic presidential nominee Hillary Clinton (C) and moderator Chris Wallace wait to begin the final presidential debate at the University of Nevada October 19, 2016 in Las Vegas, Nevada. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

Republican presidential nominee Donald Trump (L), Democratic presidential nominee Hillary Clinton (C) and moderator Chris Wallace wait to begin the final presidential debate at the University of Nevada October 19, 2016 in Las Vegas, Nevada. / AFP / Brendan Smialowski        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)