The Last Word with Lawrence O'Donnell 05/16/12

Romney takes the Biden Bain bait

After Vice President Biden's fiery attack, Mitt Romney breaks his silence on Bain Capital and responds with a claim Washington Post fact checkers deem "untenable." MSNBC's Alex Wagner and Chris Hayes discuss with MSNBC's Lawrence O'Donnell. ... more Duration: {{video.duration.momentjs}}