Prior to 1977 and again from 1980 through 2000, the Board of Supervisors was chosen in at-large elections, with all candidates appearing together on the ballot. The person who received the most votes was elected President of the Board of Supervisors, and the next four or five (depending on how many seats were up for election) were elected to seats on the board. District elections were enacted by Proposition T in November 1976. The first district-based elections in 1977 resulted in a radical change to the composition of the Board, including the election of Harvey Milk, only the third openly gay or lesbian individual (and the first gay man) elected to public office in the United States. Following the assassinations of Supervisor Milk and Mayor George Moscone a year later by former Supervisor Dan White, district elections were deemed divisive and San Francisco returned to at-large elections until the current system was implemented in 2000.