I'm just going to repost
what I wrote last week on why Sanders lost because no amount of conspiracy is going to outweigh not doing what is necessary to appeal to older black voters in the Democratic Primary:
Sanders lost on his own though poor strategy and lack of outreach beyond his base, as well as
grossly misinterpreting why and how he appealed to a subset of Democratic voters in 2016.
They put all their effort into a strategy that was based on turnout of groups that don't generally turn out for primaries, younger voters primarily, and lost because they didn't have a strategy turn out enough to give him an outright majority and likely never could. Even Sander's campaign staff know this. Until Sanders supporters understand why he lost the 2020 primary in a more self-critical way, they will continue to lose elections to more moderate candidates.
The Vermont senator's famous independence built a movement. It also made it harder for him to adapt to changing circumstances.
www.huffpost.com