The national population shift from rural to urban has been underway for decades. Some would say that it is wise for CA to plan for this, that is the Public Purpose.
Also the population shift from the northeast, Ohio valley, and Great Lake states to the south, southwest, and west.
Also, the western plains and intermountain deserts are de-populating.
The author of this article, Wendell Cox, has two websites, Demographia and The Public Purpose, that deal with this.
Look at a state like Texas and the politics of rural vs urban is simmering just beneath the surface plus the needs in the state for water, power, roads, and pollution control, etc to accomodate the population growth as yankees and Californians move in.
...and wetbacks... BTW, that urban / rural conflict was obvious even on the (thankfully, now over) TTC discussions here on FR. Rural and small town Texans hated the TTC abortion. (I know first-hand: I attended the THC "public meeting" smoke and mirror shows in several counties. The rural hatred for the TTC was ready to explode...)