I would like for Bernie to have a plurality going in to the convention, but not a majority of the delegates. Let them fight it out at the convention. I don’t see anything good for the Democrats coming out of that.
The maximum chaos would be for Bernie to have enough delegates to lead comfortably then watch the Democrats screw with him in order to turn it into a brokered convention and pick a different nominee. The Bernie Bros would be so frosted they will riot in Milwaukee.
We would see a fractured party and proof positive to practically everyone that the Democrats cheat like hell. In fact, I’m not so sure that the Dems didn’t intentionally botch Iowa and some other states for the very purpose of denying Sanders delegates proportionally.