Prop. 8 Supporters: We Don't Need Evidence

To give you a sense of why U.S. District Vaughn Walker felt comfortable in concluding that there is no rational basis for Proposition 8, California's ban on same-sex marriage, here is his summary of the evidence presented by the measure's supporters:

Proponents argued that Proposition 8 should be evaluated solely by considering its language and its consistency with the "central purpose of marriage, in California and everywhere else,…to promote naturally procreative sexual relationships and to channel them into stable, enduring unions for the sake of producing and raising the next generation."…

At oral argument on proponents' motion for summary judgment, the court posed to proponents' counsel the assumption that "the state's interest in marriage is procreative" and inquired how permitting same-sex marriage impairs or adversely affects that interest. Counsel replied that the inquiry was "not the legally relevant question," but when pressed for an answer, counsel replied: "Your honor, my answer is: I don't know. I don't know."…

Despite this response, proponents in their trial brief promised to "demonstrate that redefining marriage to encompass same-sex relationships" would effect some twenty-three specific harmful consequences. At trial, however, proponents presented only one witness, David Blankenhorn, to address the government interest in marriage. Blankenhorn's testimony…provided no credible evidence to support any of the claimed adverse effects proponents promised to demonstrate. During closing arguments, proponents again focused on the contention that "responsible procreation is really at the heart of society's interest in regulating marriage." When asked to identify the evidence at trial that supported this contention, proponents' counsel replied, "you don't have to have evidence of this point."

Walker's opinion is here (PDF).