It's not that simple. I have a term I use called "hit the mark" alternate history, which is where something is assumed to just be destined to happen like an actor hitting their mark in a scripted production. That's not fair to history. Everything is changed completely on a dime and relies on all these tiny little details.
This affects California politics and who is governor, which in turn affects the nation. You've just altered things since 1966, if not earlier. No Reagan to pick up the pieces after Goldwater. No run in 1968, with a perpetual run until finally getting the nomination in 1980. Whatever thoughts or actions Reagan influenced in history and people is not there. Whoever may fill that gap makes for different things, and they leave a vacuum from wherever they left which needs to be filled, which leaves another vacuum to be filled, and so on, leading to more changes.
The OTL 1980 isn't going to happen.