Earlier quoted context omitted.
The subtle rebranding of Democratic party to democrat party is a pretty strong tell for highly partisan perspective. How does California compare with similarly large Republican-dominated states? Anecdotally, I’ve seen a lot of really bad legislation originating from any legislature that has no meaningful opposition.
I'm a pretty pedantic person, but even I just use one or the other at random. I don't think it's a good idea to read into things like this.
If you care about the perception of what you write, this is one of those things that will quickly steer your audience one way or the other. It has become so consistent that I would personally try not to get it wrong lest it distract from the point I'm trying to express.