Not just California but also Virginia - and we are right next door to Washington DC. I guess Trump has also written off Corey Stewart. No need to vote in Virginia.
Unfortunately, he may bring down several pubbies in the US House with him. Viginia is now a blue state and turning bluer by the day. Hillary won by over 250,000 votes in 2016. Trump has no chance in Virginia in 2020. I doubt he will bother campaigning in Virginia for 2020.