I like this paragraph by Wilkinson 

Instead, they whined that Mr. Trump’s negligence and incompetence were to blame for America’s economic woes and complained that Mitch McConnell wouldn’t even consider the House’s big relief bill. They weren’t wrong, but correctly assigning culpability did nothing to help working-class breadwinners who can’t bus tables, process chickens, sell smoothies or clean hotel rooms over Zoom.

Of course it's his opinion and not backed up here with any stats. But it summarizes well a lot of things I have read elsewhere, like about how the Democratic party is becoming more and more the party of the educated elite, how more working class Hispanics went for Trump this time, how many others voted GOP downticket even if they voted for Biden for president, etc., and even how elite educated kiddies took over BLM protests that ended up with lots of damage to small business when they were already so downed by the pandemic measures.

For me one bid irony of the election is turning out to be that many in the Democratic party for decades would suggest that if they could just increase turnout, they would win the whole shebang every time. Well we got record turnout and surprise surprise surprise! Ain't as easy as they thought.

Charlie Cook on Trump's Repeat Performance With Late-Deciding Voters, Nov. 17

[....] This column speculated last week that a slice of voters who seemed intent on voting not just against Trump but also to punish his party may have had second thoughts about putting Democrats in charge of everything.

This year, the undecideds broke moderately back toward Trump, making the race closer than it seemed to be earlier, but not enough to save him from losing five states he won in 2016—Arizona, Georgia, Michigan, Pennsylvania, and Wisconsin—as well as Nebraska’s 2nd Congressional District. In congressional elections, the undecideds clearly broke toward Republicans, with some who cast ballots for Biden coming back over to vote for GOP candidates for the House and Senate.

What could have triggered the bout of cold feet among this narrow but apparently pivotal slice of voters? Could it have been all this talk of socialism, defunding police, Medicare-for-all, racial tension, or episodes of urban violence over the summer? Research by Democratic pollster Stan Greenberg points in that direction. Toss in, perhaps, some fear that a Democratic president and big Democratic majorities would, if they couldn’t win the game, simply change the rules by packing the Supreme Court or ending the Senate filibuster. In any case, the drop-off in votes from Biden to votes for Democratic House candidates was about 4.2 million nationwide; for Republicans, it was only about 1.8 million.[....]