Democratic political strategy
We have data so that we don’t have to go with our guts
You can check out the vote totals
https://en.m.wikipedia.org/wiki/2016_Democratic_Party_presidential_primaries
https://en.m.wikipedia.org/wiki/2020_Democratic_Party_presidential_primaries
I would argue the 2016 is a better reflection, in 2020 there was a sort of coordinated drop out of centrist candidates on Super Tuesday as the establishment wing of the party threw their weight behind Biden.
But in either case the answer is that the Democratic Party is basically a coalition party of centrist Dems that seem to be fine with shifting further and further to the right and more progressive voters. In 2016 it was pretty evenly split so there is appetite just not enough for a viable party.
Ok, where’s the Progressive party then? If the existing parties are leaving such a huge part of the population without a party (based on what people are saying) then it should be a guaranteed win, right? Why don’t the progressives Democrats (and left wing independents) get together and tell the rest of the Democrats to fuck off? Sanders has a ton of support, you just proved it!
I’d refer you back to my first comment that explains the structural incentives and disincentives that prevent an alternative to the Democratic Party from emerging
Nope, it doesn’t explain why you’ve got progressives that would rather live with the status quo instead of saying “You know what, fuck you guys, we’re done.” when the party clearly works against them. Hell, there isn’t even a movement comparable to the tea party! I’m more and more convinced that it’s all just a show and they’re just happy the way things are and would rather keep things as is than potentially lose their seat by actually fighting against the status quo.