Gus van Sant’s new biopic on Harvey Milk, the gay activist and politician assassinated in San Francisco’s City Hall in 1978, opened just three weeks after voters passed a constitutional amendment undoing California’s legalization of same-sex marriage. “How does Proposition 8 change the meaning – the symbolic significance as well as the real-world function – of Milk? And if the film had found an audience early enough, could it have made a difference?”