he thinks the state should go its own way because he doesn't like who has just been elected to the top job in the country.
Incorrect. I'm sure that as a vaguely lefty-liberal Californian type, he wouldn't have liked *any* Republitard. He probably really disliked George W. Bush, but he didn't launch this symbolic independence campaign then, and I very much doubt he'd have done so if we have President-Elect Rubio or Cruz today.
Trump is in a category of his own. The combination of stunning ignorance and an unbreakable belief in his own genius is a recipe for disaster on a scale not seen since the [First] Civil War.