<p>Democratic presidential nominee Hillary Clinton smiles as she walks past Republican presidential nominee Donald Trump at the end of the third presidential debate at UNLV in Las Vegas, Wednesday.</p>
October 20, 2016
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October 20, 2016 9 p.m.
Trump might not accept results
Threatening to upend a basic pillar of American democracy, Donald Trump refused Wednesday night to say he would accept the results of the November election if he loses to Hillary Clinton