An interesting case can be made that the cities of Stockton, Fresno, Modesto and Bakersfield should secede. They would be about the same size as Oklahoma. They would have Senators who would care about agriculture. They could control their water rights for Agriculture instead of losing them to the cities. Lastly the could establish research institutions that would drive investment and job growth in the poorest areas of CA. Such a state would be reliably Republican and would change the calculation of electoral politics and the Senate balance of power.