The Last Word with Lawrence O'Donnell 05/15/12

Obama and Romney air dueling attack ads

An Obama super PAC airs an ad attacking Romney's record at Bain Capital and Romney fights back with an ad featuring unemployed Iowans. MSNBC's Krystal Ball and E.J. Dionne discuss the economy and grade Obama's visit on The View with MSNBC's Lawrence O ... more Duration: {{video.duration.momentjs}}