There’s been talk (again) of splitting California in two, north and south. What if a better idea is to grow California into a larger nation/state instead? Would the trade-offs inherent in becoming a larger western state be offset by the value of losing the irrelevant influences of Washington DC and New York? According to this article in FastCompany, natural borders can be plotted by tracking the mobility of money.
The article below uses complex computational models to plot the borders.
California, one of the 8 States of America.