The Good News from Wisconsin: John Nichols; plus Harold Meyerson on Bernie and Biden

Despite massive Republican efforts to prevent Democrats from voting in the Wisconsin primary, the Democrats won--by a huge margin. John Nichols explains how they did it -- and the implications for November. Also: Harold Meyerson comments on Bernie's endorsement of Biden on Sunday - and the skepticism of some of Bernie's supporters about Biden, as well as the apparent reluctance of some progressive leaders to join Bernie in the endorsement.