Coons: Trump’s defiance ‘putting American lives at risk'

Despite denial of the election results by President Trump, the transition to a Biden administration is moving forward. One of Biden’s closest allies in the Capitol is Democratic Sen. Chris Coons of Delaware, who reportedly is under consideration to become secretary of state. Coons joins Judy Woodruff to discuss his concerns about U.S. military moves in Afghanistan and Trump’s refusal to concede.