Sergey Brin and the who's who of the tech scene just spent millions in donations ahead of California's wealth tax vote

Max Levchin, Sergey Brin, Eric Schmidt, and other billionaires dumped millions in donations ahead of California's wealth tax.

Kevin Dietsch/Getty Images, Evan Agostini/Invision/AP, Yoan Valat, Pool via AP

• The who's who of California's billionaires are pouring millions into state campaigns.
• Sergey Brin, Max Levchin, Eric Schmidt, and others donated $35 million to support housing reform.
• The donations come ahead of a contentious billionaire wealth tax that could go into effect soon.