Congress has fired back in a lawsuit challenging the constitutionality of the Defense of Marriage Act’s definition of marriage as between one man and one woman.

In a motion to dismiss in the Southern District, former solicitor general Paul D. Clement and his legal team argue that the act, 1 U.S.C. §7, is entitled to a presumption of constitutionality, and that U.S. Supreme Court precedent holds that an exclusively heterosexual definition of marriage does not offend the equal protection clause.