How many people, do you think who are likely to base a vote on someone being clled a socialist are going to indepedently arrive at a conclusion diferent to what Republican President says though?
I mean me and you can agree, Biden isn't a socialist. However neither of us are American and Trump voters. If I were, I'd probably genuinely believe Biden was a socialist just as Sanders is.
So many in the US that are afraid of socialists couldn't even accurately tell you what it is.