That’s how I read it…

The USSR was integrated too, and still broke up.

This situation would be more similar to that than Brexit.

I still think the US states splitting up like the USSR did is entirely on the table.

California is not going to continue being the republican punching bag and funding red states forever.

A split like this would likely allow some people to move, and ease the tensions measurably.

The states would still trade/function with each other, I don’t expect them to go to war or anything.