I came across a piece of California legislation today (AB 794) that Tesla is opposing. It appears - I've only skimmed it - that it would tie EV manufacturer eligibility for participation in state EV incentive programs to workforce standards and domestic location of final assembly. It's sponsored and supported by unions.
Link for those who want some light reading. I recommend the committee analysis (see the appropriate tab on the link) for a much more readable format and background information.
I think Tesla diversifying outside of California was a very prudent decision.