Truly have no clue. We should have learned what we needed to and moved on. Or at least what we do need to learn shouldn't have to involve a return to Bernie v Hillary slugfests between stans. It's sad that a few words from Republicans are enough to distract so many from Trump's administration to argue about a lost election.
Both Bernie and Hillary fans are being negatively effected by what's happening now. It's time for Democrats to stop bitching about each other and focus on motivating their friends and family to take action. People have to vote, call their reps, etc.
If you're going to relitegate the primary you're playing right into the GOP's hands. They'll convince you that even "your side" isn't with you. This drum gets beat so much because they don't want Democrats to vote or get behind new candidates.
Focus your attention on motivating people to put an end to this nightmare in 2018. Focus your attention on resisting, contributing or volunteering. Focus your attention on educating political moderates. That's what progressives in this country should be doing.