How do you split it up?
I dunno, maybe find an island 5,000 miles away from any landmass and put "them" all on it? :-)
Welcome to National California. Still lots of patriotic normal Americans. But permanently outnumbered by ghetto voters, imported third-world-voters, and self-loathing- ideologue-voters.
Cut the big cities loose and let them become self-governing city-states. Any libs who choose to live under the leftist boot can move to a city. If they behave themselves, the rest of the country will sell them food.
“””How do you split it up?”””
In looking at your map, it would be easy to split it up.
1. The RED areas would become the UNITED STATES OF AMERICA.
2. The BLUE areas would become the UNITED CITIES OF AMERICA.
I do hope the folks in the United Cities of America enjoy their diet of Soylent Green.