The West Coasters have colonized the Mountain states.
The long sordid history: First the west coast was invaded by the east, (50-60 years ago.) But there was plenty of room, and western types mind their own business. Then the first round evacuated to the inland west, (about 30-40 years ago.) The second round was the former easterners, now west coasters, (liberals,) following. It is the spread of the eastern liberal disease.