So, CA and NY wanna stay blue? Fine with me. And I hope that the blue-zoners living in red-states, just pack up and move to the blue states. But for now, the pockets of insanity are being quarantined to the coastlines. This is sound strategy.
Now before anyone gets on their highhorse -- incoming ballistics from ships or from hostile countries would more than likely hit coastal zones. These can be readily defended if the inner states (flyover country) is ready for the drill. But if blue pockets remain sturdy in the mid-states, this creates a multiple-tiered need for national defense. My two cents.