Electoral district boundaries drawn only to disenfranchise blacks violate the Fifteenth Amendment. Decided November 14, 1960 (argued 1960). Opinion of the Court: Felix Frankfurter → go there Applied: the Fifteenth Amendment → go there Topic: Discrimination based on race and ethnicity. Gomillion v. Lightfoot, 364 U.S. 339 (1960), is a landmark decision of the Supreme Court of the United States that found an electoral district with boundaries created to disenfranchise African Americans violated the Fifteenth Amendment. Wiki link