No one is voting for Joe Biden in 2020.
There are two groups supplying Democrats the vote: those who HATE THAT M(&^(*&F*&%^* TRUMP, and those who want socialism, and know President Harris will give it to them. (Like a Venn diagram, the two groups overlap.)
Probably a YUGE overlap, given President Trump is in the way of a woiker's pair-uh-dice...