That’s an approach I’d never considered - is there wiggle-room in the state constitutions to split into smaller states?
Article IV Section 3 of the US constitution
New States may be admitted by the Congress into this Union; but no new State shall be formed or erected within the Jurisdiction of any other State; nor any State be formed by the Junction of two or more States, or Parts of States, without the Consent of the Legislatures of the States concerned as well as of the Congress.
If a state agrees, a new state can be formed in its territory, effectively splitting it.
And there is the rub. Conservative legislators won’t allow it in most states, because it would mean more Dems in congress.
Same in California for much the same reason. There has long been a Republican proposal to split it into 5 states so there are more Republican senators.
We could follow an approach like in the slavery days. Balance each new slave state with a free state.
NY is a very blue state on the strength of NYC. But I grew up upstate, and there were just so many differences. ITs not just that it was a conservative rural area, but it was hard to find anything in common with the city and it always felt like the city dominated and we were afterthoughts. There was definite resentment and I’m sure it hasn’t helped as upstate economies and population dwindle while NYC strengthens. At the time you could split the population pretty evenly between conservative upstate and liberal city: there’d be a new red state to balance the new blue state of Los Angeles, and everyone could more closely elect their preferences
I think it’s probably neither allowed nor disallowed in state constitutions, but I’m just a dilettante constitutional scholar. Whether it’s allowed or not under the current system, that system is broken and can’t be fixed within the limitations of the system, and it needs a disruption. Disruptions tend to be unpleasant, so this is the least-disruptive disruption that I’ve come up with. There’s even historical precedent for it, in the form of the free imperial cities of the Holy Roman Empire.