This isn't the same California. A higher percentage of immigrants have moved to California than any where else and they seem to be voting democratic. The same can be said for Illinois.
That's what I mean about doing something about the border. It doesn't take a rocket scientist to figure out that most recent immigrants will go Democrat. Their grandchildren may turn Republican, but by then, a new wave of Democrat voters has been let into the country. This is a game the GOP will always lose. Immigration levels need to be a low enough levels that the rate of absorption into the middle class and susceptibility to GOP appeal equals the rate of new immigration.