He works in a Covid-19 unit in a parking garage. Trump called it fake

As the coronavirus pandemic grows more dire across the US, Dr. Larry Keeperman treats patients in a Covid-19 unit run out of a parking garage in Nevada. After Keeperman tweeted a photo of the unit, President Donald Trump called it "fake" and echoed his false claims about the Nevada election results. Keeperman responds to Trump in an interview with CNN's Erin Burnett.