The Last Word with Lawrence O'Donnell 05/14/14

Paging the 'Flat Earth Society’

Marco Rubio, Rand Paul and other 2016 hopefuls are saying some very "unserious" things trying to be a serious 2016 contender. Ari Melber talks to Zerlina Maxwell and Richard Wolffe. ... more Duration: {{video.duration.momentjs}}