The Supreme Court’s decision in this case was seen as trailblazing. It struck down legislation aimed at closing Chinese-operated laundries in San Francisco and guaranteed noncitizens the Constitution’s protections. It was the first case to use the equal protection clause of the 14th Amendment, which prohibits states from denying any person within their jurisdiction the equal protection of the law. In a unanimous decision, the Supreme Court ruled laws with discriminatory intent were unconstitutional. This landmark case has been cited over 150 times since the Court’s decision.