Even if it was made legally possible for states to secede, I doubt it would help much - we're all too mixed up with each other. The Bluest states all have a lot

Even if it was made legally possible for states to secede, I doubt it would help much - we're all too mixed up with each other. The Bluest states all have a lot of Red in their more rural areas, and the Reddest states all have a lot of Blue in their biggest cities. If such a thing were to happen, the states that ended up on each side would probably end up doubling down on the oppression of those in the other tribe who are still in their state, to encourage them to move to a state that's on their side.