There's no real way for an ideological secession to work in this country. It's not like there is some neat geographical division, with liberals living on one side and conservatives on the other. And there is a sizeable percentage of people in this country who are essentially apolitical, other than on election day.
I’d say let them have a big upside down U shape, the east and west coasts and across the north.
Just leave the rest of us alone.