Always interesting to see that part of history that's often been hidden from your school history books. Here's a two part documentary that says a lot about the 1930s in California. Note that the Hollywood studios came out against Sinclair even threatening to move to Florida if he won. They even produced fake newsreels which were "attack ads."
https://www.youtube.com/watch?v=AS77eZVIsXc Attack ads: https://www.youtube.com/watch?v=tPQfLqnsLEg
