With any luck the east and west coast will secede and become part of Europe and the central part of America where actual humans live will become a smaller but more powerful America.
Border fences will be a bitch but worth the effort.
Nah, if NY and CA succeed, no problem with a border fence. New Yorkers and Californians will be so stoned out of their minds, and their self-love so strong, they will gladly stay in their respective cesspools.
Just post sentries at the major highways. East/West coast Pajamaboys will not get off the road for fear of seeing a June bug or praying mantis. All the real men and women will have already immigrated to Real America.