The Last Word with Lawrence O'Donnell 06/04/12

Obama camp attacks Romney's darkest secret

President Obama's reelection campaign goes after Romney's darkest secret: his record as Massachusetts governor. Meanwhile, Republicans attack Romney for hiring Obamacare supporter Michael Leavitt. MSNBC's Krystal Ball and Steve Kornacki join MSNBC's ... more Duration: {{video.duration.momentjs}}