Ok. First. Those votes were not, like, commies or something. Communists broadly (but not universally ) have no faith in electoral politics beyond the ability to demonstrate how useless electoral politics are for the kinds of change they see as required. The missing votes are likely non-explicitly-ideological Americans, and the disenfranchised left wing of the Democrat coalition, who are not revolutionary socialists - they are better described as social democrats. And why so many of them voted for Biden was, at least in significant part three things that you're pretending don't exist with this meme.

1. Tremendous dislike of Trump.. which is actually still true, but he was not currently the president during this election. Trump had just spent the last few months massively fucking up the pandemic response very publicly and got covid immediately prior to the election, which made him look stupid and incompetent.

2. Because of COVID policies, voting had literally never been easier. Shit loads of people voted early because it was universally available. Led to highest turnout ever.

3. A competitive democratic primary process meant that we had a candidate selection process people could believe in to some degree. Brenie and Biden ran, and Biden won. Bernie voters saw that, looked at the situation and said "This is tolerable because we had a real process, and we can accept Biden as a stop gap under the conditions of Trump needing to be removed, and Biden being a 1 term President". It wasn't 2016, where a significant portion of potential Democrat voters saw the DNC's treatment of Bernie as unfair, and it wasn't 2024 where Biden decided to run with no true Primary after the deal was "single term president", then abruptly dropped out (good idea, shoulda done it 2 years earlier) and effectively appointed his successor by decree.

2020 was an anomaly, and as is true of 2020 in most data sets, using it as a comparison point requires many many qualifications, but Trump gained 40000 votes, Harris lost 10 million. Trump did not perform better, Harris lost voter enthusiasm, which hasn't actually been on the Democrat's side in presidential elections (which have more non-explicitly-ideological voters) since, like, Obama. It's not even necessarily that she needed to be "more left". It's that she needed to reflect the public's distrust of the political status quo and promise material gain for working people explicitly at the expense of someone else (Trump chose , for instance, immigrants and the democrats as the bad guys, but Harris could have chosen, say, rich fuckers like Musk) . She needed to be ready to rip up the floor boards, and she wasn't even ready to say she'd break from fucking Biden (who is broadly unpopular) on policy.

I really, really wish y'all democrats would stop trying to purge your own party of any dissent, because y'all coming out of this with the right lesson will be the difference between a brief period of Republican control, or several elections cycles of Democrats being unviable as a party.