(KRON) -- Former San Francisco Mayor Willie Brown has made an endorsement in this year's wide-open race for California governor. Brown has endorsed billionaire Democrat Tom Steyer to hold the highest seat in the state's office. "I am for Tom Steyer, and I want to tell the world I'm for Tom Steyer," Brown, 92, said. "Based on the issues that I think are important for the governorship, full and complete brain power to absorb and understand the issues and a willingness to not be persuaded by any political convenience... that's what Tom chose." Brown's endorsement can be viewed in the media player above. The clip was posted on Steyer's social media account on Tuesday afternoon. "I am grateful for Willie Brown's confidence as we work to move the state forward," a post on Steyer's X account reads. Exclusive: Katie Porter pokes fun at infamous viral moment in new ad Tom Steyer, Democratic gubernatorial candidate for California, speaks during a gubernatorial debate at KRON Studios in San Francisco, California, US, on Wednesday, April 22, 2026. California will hold its primary election on June 2, where the top two finishers advance to the general election in November regardless of party affiliation. Photographer: Jason Henry/Nexstar/Bloomberg ‘Charlie Kirk Way’: California street named after slain right-wing influencer Brown's endorsement of Steyer comes shortly after a new poll was released by the California Democratic Party. It revealed that Steyer was in fourth at 12%, behind the leaders who are tied at 18%: Democrat Xavier Becerra and Republican Steve Hilton. Other notable endorsements for Steyer include Congressman Ro Khanna (D-Santa Clara), the California Teachers Association and California Nurses Association. Brown was mayor of San Francisco from 1996 to 2004. A fellow former San Francisco mayor and current California governor, Gavin Newsom, has not made an endorsement for his successor in this year's election. ...read more read less