I did #DemExit and will not vote for any Democrats again, unless they are true Progressives. That would mean, like Rep Tulsi Gabbard. I may not vote for "Saint" Warren again, or Markey and Neal, the other Dems in my state.
When they decided to allow the super-delegate system, what I call the "super-predator" system and took part in it, they totally lost me. "One person, one vote" is the only democratic principle, and it is how Trump defeated Clinton, despite her spending twice the amount on her campaign.
The dishonesty and cheating has permeated the DNC, and they are a lost cause. It is too bad that Sanders is joining in with the corrupt cheaters that defeated him and got Trump elected. Good luck, but I predict that not only will he not save the DemocRATS, but there will be backlash against them and him, and they will lose in 2018, and 2020. Because I will never condone the DNC rot, or vote for them. And there are many like me who realize that THEY got Trump elected, not Russia, or Jill Stein, or Sanders (who many continue to claim is not a "real Democrat"). They are a dead party, Governors, House, Senate, and POTUS, and you can't raise the dead.