This whole topic reminds me of the Eastern Roman Empire, which watched region after region fall to the Ottomans, while the leaders fought amongst themselves, at times allying with the invaders to battle their own Byzantine rivals. Eventually there was only Constantinople left. We know how that turned out.
That’s certainly worth mentioning.
I can think of a number of states that would go if California should.
California
Oregon
Washington
New York
Some New England states
What about our nation’s capital?
Washington D. C.
Did you notice we just won some Leftist states? That wouldn’t happen again. Michigan came with us. A few others did too.