2018 San Francisco mayoral special election
Ed Lee, who was appointed Mayor of San Francisco in 2011 following Gavin Newsom's election as Lieutenant Governor of California, elected to a full term in 2011, and reelected in 2015, died of cardiac arrest on December 12, 2017. London Breed, the President of the San Francisco Board of Supervisors, became the city's acting mayor.
J. Eugene McAteer
In 1967, McAteer, a Democrat, announced his intent to run for Mayor of San Francisco in the November election, opposing the Democratic incumbent John F. Shelley as well as perennial Republican candidate, Harold Dobbs. The campaign was cut short by McAteer's untimely death at age 51 in May of that year, while playing handball at the Olympic Club's downtown facility. Shortly thereafter, attorney Joseph L. Alioto, then working on the McAteer campaign, entered the race and subsequently won that fall's election, eventually serving two terms in the office of Mayor.