This was my answer as well, thanks for saving me the time.

I think one of the steps that would accelerate this is some sort of balkanization/secession/separatism, probably in the literal corners of the country. But that's still after our lifetimes (yes I saw the post upthread about lenin making this same mistake)

I think it's possible for some states to say "we're done with you holding us back, we're moving on without you". But, of course, if you're splitting off you're no longer part of the US.