The Last Word with Lawrence O'Donnell 12/28/12

Very Last Word: Ed Markey could pull Dems left

On Thursday's Very Last Word, MSNBC's Ari Melber discusses Rep. Edward Markey's intention to run for Sen. John Kerry's opening Senate seat, and what Markey's liberal views would mean for the Democratic caucus. ... more Duration: {{video.duration.momentjs}}