Well that's one way to look at it. My biggest problem with Sanders is that I don't believe that the majority of the Sanders supports actually care about winning

Well that's one way to look at it. My biggest problem with Sanders is that I don't believe that the majority of the Sanders supports actually care about winning the election for POTUS. They just seem to care about taking the Dems as far towards their views as it will go. And he has very limited chances to pick up more people in the general election unless he can get Hillary to drop out before April/May. It's hard to go from "Socialist" to "potential President" in 6-8 weeks, especially in an election that is going to be fairly close once the GOP figures out who they are going to get besides Trump. Of course, that could all change if Trump gets knocked out early and decides to pull a Ross Perot.