Rep. Jim Himes: Maguire needs to ‘come forward’ following Russia briefing reports

02:33

Rep. Jim Himes tells Lawrence O’Donnell that Joseph Maguire "and anyone else who was in that room needs to come forward." He says these officials "can't do a Mattis." If it is true that Maguire was dressed down by Trump as multiple reports suggest, "Maguire needs to speak up right now and tell the world that's what happened."