Nobody knows.
However, if we are to go based on history, the lesson this election has taught them was that America is more conservative than they thought, so they'll double down on conservatism. They basically abandoned new deal policies that had helped them win elections when carter lost to Reagan. They decided they'd out-conserve the conservatives in America. They'd be more friendly to police, cut even more spending on social programs, repeal regulations on wall st, give more money to the military etc. and it worked. They've been running the same playbook since.
If they're going to do what they did before, and what Harris tried to do this time(genuinely seek support from republicans including dikk Cheney himself), then they'll basically be even more republican than ever before.
But if they look at things carefully they'll notice a few things:
1. Facts don't matter, vibes do. Being entertaining and interesting is more important to the American public than if you're intelligent and professional. You can be an absolute fukking moron and win because the electorate is full of people that are incredibly stupid. They are stupid enough to vote against their own interests, so being funny, likeable, and saying the shyt people like to hear is more important.
2. The mainstream media cares more about a horse race than presenting facts. It's a waste of time trying to get on their good side, because even if you play by their rules they'll give more screen time to your opponent.
3. Material conditions are important, and people need to know that you're addressing them. Saying how you're going to address the issues is irrelevant. The details don't matter as much as the fact that you acknowledge the issues. Having "concepts of a plan" is apparently enough.
Those three things are very important and they can win an election if the economy tanks under trump. The playbook usually goes like this:
1. Democrat fixes the economy a republican broke but it takes time for the changes to take effect -->The morons that make up the public are too impatient and vote for a republican--->The economy improves not because of anything the republican did, but because the policies that the democrat before him triggered are starting to take effect-->The republican wins re-election in spite of his dumbass policies and not because of them. The idiots consider him a good president while allowing him to take credit for the benefits of his predecessor's plans.
What Trump is planning on doing is interrupting this process. If he doesn't die in office, and he's successfully able to challenge and revoke the 22nd amendment through his partisans in the supreme court, what happens next is he gets a third term. This means that the policies HE triggers in his term will take effect while he's president. If he can be blamed for the economy going to shyt, then people will be furious at him and will want to get rid of him.
But then again, as I've said multiple times in this post, the american public is full of morons. So they may still literally blame anyone but the guy who said he'd make the economy great and failed to do so despite having all the tools and no meaningful opposition.