I live in California in a conservative region of the stat and this state is os leftist in how it operates spending money here would be a waste of campaign money on the short term. on the long term money on advertising is needed to someday retake the state but that is decades away from ever happening.
i would normally agree with you but there is so much antipathy to Hilliary (had the D’s nominated Bernie, he’d win Cal per almost all my friends there, and I would not even suggest otherwise)
so... anyway I still think Mr Trump could take CA, but I understand your POV and you could be right. it will be interesting to see if he really tries to win CA or if he writes it off (to concentrate on other states, like his own state of NY, FL, OH, MI, etc.)