... he leaves Los Angeles in the north.
Picture the political gerrymandering that could be done if it were feasible to redraw state lines!
Now, California is way too big. It's population is 37,253,956, according to the 2010 census. That's nearly 10 times the size of the entire United States at the time of the first census in 1790 (3,929,214). At the time of the founding, of course, there was much talk of the United States as a "large" republic. (See, e.g., Federalist #10.) The states were supposed to have an important role offsetting some of the problems of that largeness. How is that supposed to work today, especially in the absurdly overlarge California?
But redrawing the lines now? One look at Jeff Stone's South California map should tell you what chaos lies there.