The Last Word with Lawrence O'Donnell 09/26/17

Lawrence: In Steve Bannon vs. Donald Trump, Bannon wins

The Steve Bannon-backed candidate for Alabama's GOP Senate nomination has defeated the Donald Trump-backed incumbent in what might be just the first round of Bannon's battle against the GOP. Mike Murphy, Jason Johnson and Ron Klain join Lawrence O'Donnell. ... more Duration: {{video.duration.momentjs}}