San Jose Mayor Matt Mahan announced his run for governor Thursday, slammed Newsom’s attention-hogging Twitter antics in an interview. 5 San Jose Mayor Matt Mahan announced his run for governor Thursday. Darren Yamashita-USA TODAY Sports5 San Jose Mayor Matt Mahan slammed Gov. AFP via Getty Images“My primary focus is not going to be on internet trolling,” Mahan told Politico. Office of Mayor Matt MahanHe traded catty tweets with Newsom’s press team earlier this month over funding for a San Jose “tiny home” village for the homeless — one of Mahan’s signature initiatives as mayor.