A lasting populist movement?

See this article. It's what many in the Sanders movement are wondering. Will it all end when he doesn't get the nomination? If not, how will it hang together all the diverse interest groups behind Sanders? Some are trying to lay out "a plan for building a lasting advocacy organization that would rival the tea party or the National Rifle Assn. by leveraging Sanders' massive donor network and grass-roots organizing operation to win local-level elections and push a progressive agenda. Other Sanders supporters are meeting in Chicago in June to map out a plan for continuing the fight." One issue is whether to do so from within the Democratic Party, which this nomination process have proven to be corrupt beyond repair.