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Donald Trump, 2016 Republican presidential candidate, stands as Hillary Clinton, 2016 Democratic presidential candidate, exits the stage after the third presidential debate in Las Vegas, Nevada, U.S., on Wednesday, Oct. 19, 2016. Donald Trump is trying another wild-card play in the third and final presidential debate with Hillary Clinton in perhaps his last chance to reverse his campaign's spiral and halt his Democratic rival's rising electoral strength. Photographer: Daniel Acker/Bloomberg via Getty Images

Donald Trump, 2016 Republican presidential candidate, stands as Hillary Clinton, 2016 Democratic presidential candidate, exits the stage after the third presidential debate in Las Vegas, Nevada, U.S., on Wednesday, Oct. 19, 2016. Donald Trump is trying another wild-card play in the third and final presidential debate with Hillary Clinton in perhaps his last chance to reverse his campaign's spiral and halt his Democratic rival's rising electoral strength. Photographer: Daniel Acker/Bloomberg via Getty Images

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LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump looks on during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Chip Somodevilla/Getty Images)

LAS VEGAS, NV - OCTOBER 19:  Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump looks on during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8.  (Photo by Chip Somodevilla/Getty Images)

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LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump smiles after the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Chip Somodevilla/Getty Images)

LAS VEGAS, NV - OCTOBER 19:  Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump smiles after the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8.  (Photo by Chip Somodevilla/Getty Images)

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LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton shakes hands with Fox News anchor and moderator Chris Wallace as Republican presidential nominee Donald Trump looks on after the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Win McNamee/Getty Images)

LAS VEGAS, NV - OCTOBER 19:  Democratic presidential nominee former Secretary of State Hillary Clinton shakes hands with Fox News anchor and moderator Chris Wallace as Republican presidential nominee Donald Trump looks on after the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8.  (Photo by Win McNamee/Getty Images)

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LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump looks on during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Drew Angerer/Getty Images)

LAS VEGAS, NV - OCTOBER 19:  Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump looks on during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8.  (Photo by Drew Angerer/Getty Images)