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.
2017 San Antonio mayoral election
Julian Castro, who was elected mayor in the 2009 San Antonio mayoral election, resigned in 2014 to become the United States Secretary of Housing and Urban Development. Ivy Taylor was selected by the San Antonio City Council as Castro's successor. Taylor successfully ran for re-election as mayor in the 2015 San Antonio mayoral election.