Just to make this more explicit, I lived near a mall growing up. The mall actively fought against getting a bus stop put in near by. Why? Because if there is a bus stop near the mall, then, gasp, THOSE PEOPLE might come to the mall. And by those people, I think we all know I’m talking about.

No. There is no mechanism to allow this. The union is perpetual, and cannot be brought to an end. A state can no more leave than US than a city or a house.