San Francisco Mayor London Breed is fighting a self-funded philanthropist for reelection while in nearby Oakland, Mayor Sheng Thao is battling a recall election.

The signature gathering required to bring Thao’s recall before voters was bankrolled by a single Piedmont resident, Farallon Capital hedge-fund manager Philip Dreyfuss, who poured at least $1.9 million into the Alameda County elections this past year.

The effort to recall Oakland Mayor Sheng Thao is now in the hands of voters, less than two years since she assumed office.