That's an interesting question. I, personally, write in candidates. I don't think I've voted for a (R) or (D) candidate on the ticket in the last 40 years.

Biden was a very mediocre candidate after the disaster that was Hillary. I think Bernie would have been a decent Populist president, but all of Congress (along with the DNC) would have been pulling against him, so he would not have gotten much done.

People voted for Biden simply because he wasn't Trump. Now that Biden has shown that he's not a very good President and he puts corporate interests in front of the people (as we already knew, but it pissed off the progressive far Left)... we are setting up a stage for Republicans to do very strongly in the midterms. Would Trump win in '24? I don't think so, since we know all of his true colors, but he'd make a showing. I think Biden would have to come to the table with something new in order to pull off a definitive lead.

I think almost any other Republican (other than race-to-the-bottom Idiocracy types like Marjorie Taylor Greene) would make a stronger showing than Trump. He has pissed off the Left, the Center, and even his own on the Trump Right wing of the GOP. His own people say that he doesn't pass his own purity tests as their Fuhrer. So I do not believe he'd win a fair fight if it was held today.