The Last Word with Lawrence O'Donnell 04/15/15

Hillary Clinton campaign wraps up Iowa trip

Hillary Clinton's first trip to Iowa as a 2016 presidential candidate ends, while Martin O'Malley releases an add subtly hitting her for her stance on same-sex marriage. E.J. Dionne, Josh Barro, and Jennifer Jacobs join Lawrence O'Donnell. ... more Duration: {{video.duration.momentjs}}