California’s wealthiest donors are overwhelmingly backing San Jose Mayor Matt Mahan (D) in the heavily contested governor’s race.

An analysis published Thursday by the San Francisco Chronicle shows that more than 30 billionaires, most of them based in the state, have poured close to $9 million into the election, either by donating directly to candidates or to outside committees backing them. The overwhelming share of that money has gone to Mahan, one of eight Democrats vying for the office of outgoing Gov. Gavin Newsom (D-CA).