Biden's approval ratings, per 538, have barely budged at all in over three years, hanging around 40% plus or minus a point or two. They are certainly not great, but only a percentage point or two different than Trump's. All Biden needs to do is keep the campaign focus on positives, with only an occasional negative reminder about his sleazy opponent. I agree with you about the abortion issue. It is going to be a large part of this election. Tis why Trump is so reluctant to be pinned down on the issue. If he supports a national ban, he's going to lose. If he doesn't support a national ban, the evangelicals won't be happy. Supposedly he's going to issue a statement next week. Should be interesting.
It may come to choice between a candidate voters fear is too old to one they fear is too dangerous. Trump is about to be hit by a massive television campaign painting him a threat to the foundations of the country. The most effective part may well be one by
"Republicans Against Trump" budgeted at 50 million dollars already in the till and ready to go.