Well, I think the lobbying and pressure groups will be on the Democrats side. I truly expect Biden to bow out "due to health reasons" from the race at some point. Once that happens, I do not expect Trump to have any chance as he would not be running against Biden's record.
He would be running against a fresh face where for most people that person not being Trump would be a good reason to vote for Democrats up and down ballot.
POTUS and the House will be Democrats and the Senate will be a toss up, though it should have been a GOP majority.
At that point I hope that Trump will bow out of politics instead of keeping poisoning the well for the GOP. Though, I expect him to cry about being cheated out of this election as well so he can fund raise off of it for some time to come in order to pay his legal bills etc..
Edit:
Speaking of legal fees, $50 million of donations from his base went to pay for Trump's legal fees in 2023.