No, he really doesn’t, because of winner takes all elections and the two party system. The Nash equilibrium is for both major party candidates to align their platforms right on the 50% median voter. This maximizes the votes for both of them.
In this specific upcoming general election, Biden’s base voters have nowhere to go to except the Cheeto fascist. Not much reason to cater to their policy preferences–they don’t have a real choice. That’s been reflected in the chatter on Lemmy as well.