On December 19, 1974, Moscone announced he would run for Mayor of San Francisco in the 1975 race. In a close race in November 1975, Moscone placed first with conservative city supervisor John Barbagelata second and supervisor Dianne Feinstein coming in third. Moscone and Barbagelata thus both advanced to the mandated runoff election in December where Moscone narrowly defeated the conservative supervisor by fewer than 5,000 votes. Liberals also won the city's other top executive offices that year as Joseph Freitas was elected District attorney and Richard Hongisto was re-elected to his office of Sheriff.