The Last Word with Lawrence O'Donnell 03/12/12

Santorum pinning hopes on convention

Rick Santorum’s campaign said his path to the Republican Party's presidential nomination relies on an open convention in the summer. MSNBC’s Lawrence O’Donnell gets analysis from Rick Tyler, a senior advisor a pro-Gingrich super PAC, Hogan Gidley, ... more Duration: {{video.duration.momentjs}}