Here is how Trump might win CA
If Bernie is the dem nominee
Lots of dems simply will not vote
If Bernie is the Democrat nominee the Carville strategy its the economy stupid will prevail. I dont think the middle class, the Mom and Pop business, Hollywood, big tech, big business folks want confiscatory taxes on their earnings. They will IMO hold their collective noses and vote for the practical, smart Republican candidate, President Donald Trump.
If Biden gets the nomination and the Bernie zealots believe he got screwed by the nomination process, they may vote for Trump out of spite.