Danny Bateman
Donor
Maybe Bernie would be better served just splitting off from the Democratic party (after this is done) and forming a new, viable, third party. He clearly has an appeal to a large swath of America.
This sounds nice in theory and in a better system we'd have more than two parties, but if these two wings of the left don't get along and agree to support each others' candidates (and the GOP remains intact), it functionally forces our country into unopposed Republican rule.
So it would really depend on how its structured and how the different factions react to each other.