Why can’t California create viable national leaders anymore?

Once upon a time, Hollywood and California seemed to be leading the country, for better or worse, with outsized public figures and sometimes compelling, or at least entertaining, ideas.
California politicians like Richard Nixon and Ronald Reagan achieved national power, establishing the primary strands of conservative thought.
California’s liberals were less successful, but at least they were influential. Jerry Brown never made it to the White House — he would have been our first Zen