I've always thought that admitting Orange County as a state would be a good partisan offset to admitting Puerto Rico as a state. That's just me fantasizing though. Also, I didn't realize what a large Asian community there is in OC. According to Wikipedia it is 13.59% Asian.
Funny thing, I have a friend who's moving from OC to Puerto Rico, and he's Filipino.
I just went to San Diego recently, and we flew in from John Wayne, since we couldn't get flights into S.D. My relatives all live in suburban San Diego, which is very conservative. OC is surprisingly diverse, and I do think that the main reason for its conservatism is the overall wealth there. Also, I think that Southern California is overall conservative if you get rid of L.A. There are large military populations throughout the region as well. As a Washingtonian, I horrifically noticed when flying home over the LA/OC area, that there are only houses, houses, and more houses, for miles. It doesn't seem as if they have environmental protections against urban sprawl in SoCal.