Some heretical remarks from a distant observer:

1. The UNITED States of America no longer exist. They only exist on the institutional level, but institutions need the political support of citizens to be fully functional. Without this mental background, institutions are dead, they become hollow shells (example: if you look just at the institutions, Russia is a democracy !) Trump's top-down coup failed not because of institutions, but because of the minds of dozens of judges who put law and due process above ideology or tribal affiliation.

2. The territory of the country formerly known as USA is populated by two cultural tribes locked in mutual hatred. Ideally, these two tribes should also inhabit two separate countries (maybe like Scotland and England after a referendum), but this is simply not feasible. The two tribes have to share the same big space between Canada and Mexico, even if there is no cultural and political common ground between them.

3. Given that the ideal solution (two different countries) is impossible, what about a pragmatic solution: to partially dismantle the institutional framework of the former USA. Here in Europa, the EU has the guiding principle of becoming an ever closer Union (hint: it does not work). The USA could go in the opposite direction of an ever looser union.
   That would mean that all those highly controversial issues the two tribes cannot agree upon (i.e. abortion, gun control, drugs, education, minority rights etc...) would be dealt with on the level of the member states. Sure, in some states, where the two tribes are almost even, the cultural war would go on, but the majority of states are either solidly blue or red.
   That is exactly what will happen with abortion if Roe v Wade will be overturned. The issue will be decided by the states.
   But frankly, would that be such a bad thing?
   People would decide locally how they want to live instead of one big One-size-fits-all which will always be contested by one of the two tribes? One could say that the result would be a mere patchwork, but isn't a patchwork better than a constant cultural war?