LDF has participated as a friend-of-the-court in cases across the nation, including California, Maryland, and New York, seeking to establish the right to marry for same-sex couples.
Most recently, LDF filed a friend-of-the-court brief  in United States v. Windsor urging the Court to strike the Defense of Marriage Act (DOMA) because it intentionally relegates gays and lesbians to inferior social status. LDF also joined a coalition of civil rights groups that submitted a friend-of-the-court brief  in Hollingsworth v. Perry, the case challenging California’s state constitutional ban on same-sex marriage known as Proposition 8. The brief argued that the Court should apply heightened scrutiny to laws, like Proposition 8, that discriminate on the basis of sexual orientation. LDF also filed a friend-of-the-court brief  when the case was being heard by the Ninth Circuit Court of Appeals arguing its long held view that the principles set forth in Loving v. Virginia  , the 1967 Supreme Court case which held that laws prohibiting interracial marriage are unconstitutional, establish the fundamental right of every individual, including gays and lesbians, to marry the person of his or her choice.