Unfortunately this runs into constitutional problems. While the spineless subhuman creatures in congress and the supreme court seem to have no problem with Trump and his administration ignoring the constitution I fully expect them to come down hard on any state that does so (at least in cases that go against Trump and his policies).
If the union doesn’t provide any benefits and only costs money and prevents your state from functioning as well as it could and the union only makes solutions harder to solve … why stay in the union?
States stay together because of mutual benefit, not because of a document or promises.
And you could force a state to stay in a union by force but the cost of doing that far outweighs the benefits of a peaceful union.
Don’t forget they’re Democrats.
When the courts rule against them they’ll just meekly comply.