If the DNC plays dirty AGAIN and takes the nomination away from Sanders we're gonna get 4 more years of Trump. I think they know that.
They need someone to actually get more delegates than Sanders legit, without their overt interference. If that doesn't happen you've got to saddle up and ride with Sanders.
Some among the Democratic 'elite' believe that if Sanders gets the nomination, Trump will win in a landslide and the identity of the Democratic party will be broken for 1 or 2 additional election cycles.
What the Dems should be doing is asking Klobuchar and Buttigieg to get out of the race, so their support can fall behind one or more of the other moderate candidates who can compete with Bernie.
What it appears the Dems are going to do instead is to keep all the candidates in the race to keep the vote divided and prevent Bernie from getting a majority to win the nomination outright.