I wonder if it has anything to do with a constant stream of smears aimed at Democrats...
It really drives voters away from the Democratic party when some people falsely call Democrats things like "COASTAL ELITES". Other lies that I've often heard from disloyal politicians
It certainly doesn't help to motivate Democrats to come out and vote when they hear nothing but negativity and smears coming from certain individuals and "activists".
I think if we can get our "allies" to stop comparing Biden to a BOWL OF SHIT;
-- and to stop saying that Democrats are "the party of the one-percent";
-- and to stop saying that Democrats are "corrupt";
-- and to stop saying that Democrats are "ideologically bankrupt";
-- and to stop saying that Democrats are "no different than Republicans";
-- and to stop saying that Democrats are "feeble";
-- and to stop saying that Democrats are "war-hawks";
-- and to stop saying that Democrats "don't care about the middle class";
-- and to stop saying that Democrats "don't care about climate change";
-- and to stop creating and supporting "third parties" that siphon-off votes and sabotage elections;
-- and to stop encouraging voters to abandon Democrats by voting third-party;
-- and to stop making excuses for those voters who DO vote third-party; etc-etc-etc...
well... that would be a good start in getting MORE voters to support Democrats instead of "flocking to the GOP". 
All I'm trying to say is that type of BS smears and attacks and other denigrating nonsense needs to stop, and when people call-out those lies and refute that type of negativity they shouldn't be harassed for doing so either.
One thing is clear: The lies and smears and attacks only serve to create an atmosphere of negativity: Negativity generates apathy. Apathy discourages voter turnout for Democrats. Low voter turnout gives Republicans a chance to steal the elections.
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