We're already seeing the seeds being sown for blaming them for a Biden loss.
"YOU WEREN'T CIVIL ENOUGH! YOU MADE US LOOK BAD!! THOSE SUBURBAN REPUBLICANS TOTALLY WOULD'VE VOTED FOR US OTHERWISE!1!" they'll screech.
Democrats/libs will never blame themselves for losing, only others. No matter how blindingly obvious it is that their pride and arrogance cost them victory yet again.
Like Hillary Clinton, one of their gods: They can never fail, only be failed.
There is abolutely a split that is going to happen between the centrist lib democrats and the more leftist elements. They are just too opposed to each other to be able to continue working together. When that happens you might see a lot of people get radicalised as the dems will be now openly anti-leftist/anti-communist as opposed to the passive agressive crypto stuff they are doing right now.
it's more likely that the divide between the Rs and Ds explodes into a full civil war. leftist elements are still too small and lacking in any meaningful power to split the democrats.
There are almost no leftist elements in the democratic party to speak of
base tho