California is a “one party state” because Gov Pete Wilson and the CA GOP went after the racist vote in the mid 90’s to get re-elected by heavily supporting Prop 187, which denied all state services to undocumented immigrants. Until then, it was relatively conservative.
Turns out that (thankfully) there aren’t enough racists for keep control of the state government, and since then the CA GOP has become basically irrelevant.
In the long term I think the national GOP is doing this by going after racists, extreme fundamentalists, and other fanatics.
The fanatic vote is political cocaine: temporary high, then you need more and more, then your non coke head friends drift away, then you are strung out.
> then your non coke head friends drift away, then you are strung out.
Alas, that may be more wishful thinking than reality. :( There are countless countries around the world, both in modern history and today, that prove the dynamic can be sustained indefinitely.