1977 – Vice President Walter Mondale angrily leaves a San Francisco Democratic fund-raising event when his speech on human rights in South America was interrupted by a man who demanded to know when he would speak in favor of gay rights.
Members of the newly formed San Francisco Gay Democratic Club held up signs demanding a statement on human rights in the United States. The club was created by Harvey Milk (May 22, 1930 – November 27, 1978).
Source: https://ronnisanlo.com/today-in-lgbt-history-june-17-3/