Here are mine which are probably all wrong:
Biden does not drop out. He has few if any “senior moments” from here on out because access to him will be carefully planned and limited and he will slowly claw back support, but too much damage is done and Trump wins. It’s a relatively weak victory all things considered, his 2016 map + Nevada and a popular vote margin of +1%. All the talk of Trump winning Virginia, Minnesota, Maine, etc is a pipe dream. This isn’t the Republican 2008, but it could’ve been with a better candidate.
In the senate the GOP wins West Virginia, Montana, and Ohio but predictably chokes in the other close states. In the house the republicans keep their majority but it’s a similarly weak showing to 2022.
Thomas and Alito retire in the first years of Trump’s term. Trump is about as unpopular as he was in his first term, give or take a few % either way. None of the “project 2025” stuff happens. Trump doesn’t do much of anything as POTUS.
Very little happens on immigration because both sides quietly realize that a growing population is key to economic growth and a real decline in living standards is the one thing the population absolutely will not tolerate. However there will be some change to the antiquated, post WWII asylum system. Smart Dems realize that hoards of dependents being able to overwhelm the border and stay in the country on taxpayer dime if they say a few magic words is a long term strategic threat to their party. The fiscal situation continues to get worse as Trump extends at least some of his tax cuts without meaningful spending cuts. There is a free and fair election in 2028, democracy doesn’t end and Trump leaves with his ego satisfied. Entitlements are not touched. Biden is remembered as the guy who let Trump back into office