The Last Word with Lawrence O'Donnell 07/28/17

Lawrence: Priebus exit ends President Trump's worst week yet

New Chief of Staff John Kelly will have to wrangle a man Eugene Robinson calls 'Mad King Donald' and his a mediocre staff if he's to be at all effective. Will even Kelly end up a casualty of Trump? Robinson, Peter Wehner, and Chris Whipple join Lawrence O'Donnell. ... more Duration: {{video.duration.momentjs}}