I think a lot has to do with peoples rejection of candidate Santa claus. Sanders whole strategy was to gain 30% and let everyone else divide votes up. When it was shown African Americans, the largest constituency of D's, was going go to still get behind Biden, one Bernie has no traction with, and in addition the youth vote wasnt coming out as sanders prophesied. The party consolidated....to try to save itself from Bernie blowing it up. That was bernies mistake...he never tried to unite the party. He cant bash the party claiming hes going to rebuild it in his image, while simultaneously thinking he'd have anyone to work with him...rendering him useless
I think Biden is a career dope, corpse and I think trump wins regardless, but I'd rather have Biden as the nominee as a fail safe as opposed to having a communist within reach of the office.
I love Bernie is still pushing the billionaire myth. Biden's campaign was broke before super tuesday, had zero field offices, zero ads, and it was estimated he only spent 4000 dollars. Lol.