The Democrats already go out of their why to impress Republicans bringing people like Powell and Kasich over while snubbing progressives. They take the progressive vote for granted and move hard to the right. Should Biden win there is a real chance that the republican establishment will denounce Trump and will work with Biden to "increase unity and heal the wounds Trump caused", but actually just to continue to wield power. Internally this means only the foulest compromise passing, the county being governed by a giant center-conservative coalition against the left and a few reactionary Trump loyalists. Externally China is the perfect boogyman to unite over. An empire of evil that only a united America that is true to it's roots can overcome. China is a legitimate threat to American conservatism because they show that regular "free" individualist capitalism is inferior to a collective state capitalism. They still manage to increase their populations living standards and build great infrastructure something the west has been incapable of for more or less half a century. Biden has already said that he will not be as "soft" as Trump on "dictators" and will be tough on North Korea, Venezuela, Russia (of course) and China. The democrats don't see the republicans as an enemy to be beaten to the point of no revovery, but an estranged partner, who must be brought to it's senses. For a German like me Trump might be the harm reduction candidate bringing America down faster while Biden might pull our conservative government into suppoerting another war.

You really need other venues than electoralism, like desperatly.