Now there’s no question that today the nine-county Bay Area is solidly blue, but it hasn’t always been this way. Bay Curious listener Marcus wants to know: When and why did the Bay Area become overwhelmingly liberal? The answer depends on who you ask.

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Reported by Scott Shafer. Bay Curious is made by Olivia Allen-Price, Katrina Schwartz, and Rob Speight. Additional support from Erika Aguilar, Jessica Placzek, Kyana Moghadam, Paul Lancour, Suzie Racho, Carly Severn, Bianca Hernandez, Ethan Lindsey, Vinnee Tong and Don Clyde.

When And Why Did the Bay Area Become So Liberal?