Ahead of the 2020 presidential debates between Democratic nominee Joe Biden and incumbent President Donald Trump, here's a look at top moments from previous general-election encounters. Subscribe on YouTube: https://bit.ly/2JjpnIb - - - - - - - - - - - - - Facebook: https://www.facebook.com/Newsweek Twitter: https://twitter.com/Newsweek Instagram: https://www.instagram.com/Newsweek

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