Famed Harvard law professor emeritus Alan Dershowitz says he believes President Donald Trump could have grounds to expunge his 2019 impeachment in the House after bombshell new evidence revealed the intelligence community failed to disclose that his main accuser had the potential for bias, made a false statement and only had hearsay to back up his allegations.

Dershowitz, a Democrat at the time who worked to defend Trump at the impeachment trial that ended in the president's acquittal, said it would be "an interesting, novel approach" for Trump to go to Chief Justice John Roberts, who presided over the case, or Congress and ask for the impeachment to be reversed because the defense team was denied the right to confront his accusers with exculpatory evidence.

"It's never been done. I don't see any reason why it couldn't be done," Dershowitz said during an interview Monday night on the Just the News, No Noise television show. "Impeachment is a quasi-judicial procedure, whether you have to go back to Congress and ask them to expunge it or go to the courts.