2019 San Francisco mayoral election
London Breed was elected Mayor of San Francisco in a 2018 special election to serve until 2020, filling the unexpired term of Ed Lee, who was elected in 2011 and 2015, and died in office on December 12, 2017. Breed confirmed that she intends to run for re-election to a first full term in office in 2019.
Ed Lee (politician)
In 2010 a vacancy in the office of mayor was impending when incumbent Gavin Newsom was elected as Lieutenant Governor of California. Under the San Francisco City Charter, vacancies in the mayoral office are filled by a majority vote of the Board of Supervisors, in which each supervisor is barred from voting for themselves. Speculation about possible appointees and debate on whether or not the old Board of Supervisors should cast the vote for the new mayor soon followed Newsom's election as lieutenant governor. (Four old supervisors were term-limited and four new people were elected in the 2010 election to take their place.)