https://medium.com/s/state-of-the-future/americas-paralyzed-politics-today-is-california-s-15-years-ago-5fc9c50eebc3

summary:

Why California Politics Is Always 15 Years Ahead
The Remarkably Prescient 15 Year Rule Means Trump & the National Republicans are on the Verge of a Spectacular Collapse
Peter Leyden
Oct 16, 2017
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What do we mean by California is the future when applied to politics? Modern California politics has an uncanny knack of prefiguring what happens in the rest of America in about a 15-year timeline. In other words, what happened in California 15 years ago should be studied closely to see how it will play out in America today. And what’s happening now in California will roll out over America in the next 15 years.

California experiences the future earlier than other parts of the country. Californians invent many new technologies, adopt them early and adapt new systems around them relatively quickly. They absorb waves of immigrants at the highest numbers in the country and accommodate them into their society quicker. The state is a magnet for young people, entrepreneurs, and people who want to change the world. Much of the population is unusually open to trying new things in the economy, society, and in politics.

Prescient?

Lots more at the link. It's true.