'Honestly, I don't know what to say': Neal Katyal stumped on how he'd defend Trump in an impeachment trial

Former acting Solicitor General Neal Katyal joins Yahoo News Editor in Chief Daniel Klaidman and Chief Investigative Correspondent Michael Isikoff to discuss his new book, “Impeach: The Case Against Donald Trump,” and is rendered speechless when asked how he would, hypothetically, defend President Trump in an impeachment trial.