The Last Word with Lawrence O'Donnell 09/01/17

Mueller may have new evidence of Trump obstruction

The New York Times reports that Robert Mueller has an early draft of a letter Trump and one of his aides composed when preparing to fire James Comey and is examining that letter in his investigation. David Frum, law professor Jed Shugerman, and Neera Tanden join. ... more Duration: {{video.duration.momentjs}}