Okay people
1) The banks in Calif would no longer be members of the Federal Reserve. All dollars in the state would have to outflow because there can be no inflow. They would have to create their own currency, and its conversion to dollars would be horrible.
2) Primarily because of oil. Oil production in Calif is FAR LESS than their consumption. And their oil production is falling. Without dollars they could not pay for import.
3) Yes, there is the drinking water and agricultural water problem. All court cases that give them access to US rivers would be null and void. They would have to relitigate, in US courts, not Calif courts, and they’d have no money to pay the fees.
4) All US military bases would exit. Mexico would have larger forces.
5) Medicare will NOT reimburse for procedures outside the US. All the Calif seniors will be without healthcare.
If Greece can be a country then California can be a country.
It took 4 weeks for the South to form a Federal Government and be up and running as an independent country and doing so while engaging in a major war AT THE SAME TIME using 19th century technology. You could turn CA into a country in 2 days.