Reps. Spanberger and AOC seem engaged in an early debate over the course of Democratic politics. Spanberger said Dems should deep-six talk of "socialism" and "defund police", blaming that for the defeats of some Democratic representatives who gained office in 2018, and the failure to take new seats.
AOC has a twitter thread countering that position, arguing that some new progressives won (my comment--I think they won safe seats by winning the Democratic primaries) and that many candidates were lousy in their digital campaigns.
I suspect both are right. It's a big country, but politics is often local. So positions which are popular in one place, like NYC and its suburbs, and not in another area, like southern Virginia, or southern Florida. Appeals which work with one voting bloc may well turn off another bloc. [Updated: and people are complicated and react differently to different stimuli.]
Hopefully the different parts of the party can mostly reconcile under (probable) President Biden's leadership. His task will be quite difficult: he's likely to be considered a one-termer, and therefore have less clout than otherwise. I'm reminded of 1976 and President Carter's job--he too had liberals on his left, still smarting over the failure of their dreams in 1972, and led by a Kennedy. That didn't work out well for him.