I don’t see how this would work except for places like much of coastal California and Washington State, New York City, etc. Upstate New York, western Connecticut, most of New Hampshire, Maine, 90 percent of Virginia, eastern Oregon and Washington State?? They would never leave. Even places like southern and northwestern New Jersey would never go and would be darned glad to get rid of Newark and Jersey City.
Expulsion, like a bit eject the blue counties that are being used as sanctuaries for illegals and tools for massive election fraud. The blue staters don’t get their own country either.