I would suggest secession and war. Once the mid-West leaves they can claim their borders are being threatened by sanctuary states and move in against them. They're filled to the brim with pathetic vagabonds and their vagabond masters. They aren't a match. Occupy their territory and start mass deportations and then restore the union when the country is 90% European again.

With that in mind, we must ask: Why should America be a single country at all? The states have for years already been working to nullify federal legislation on guns, drugs, healthcare, immigration, the environment, and police militarization. Why hold the states together in a union whose diktats they each want to escape? That steady resistance is unlikely to do anything but grow. Last month, after one of Biden’s top covid policy advisors called for a national lockdown, more than a dozen Republican governors expressed their refusal to comply. How much more will it take before states decide to just walk away entirely?

EDIT: I know there's a lot of talk about separation but it won't happen until or unless a group of like-minded governors and legislators agree to go together. That would require approval from the citizenry.