 According to this jurisprudence, when the Court measures a law against the Constitution and finds the law wanting, the Court is empowered and indeed obligated to strike down that law.In this role, for example, the Court has struck down state laws for failing to conform to the Contract Clause ("see", e.g., Dartmouth College v. Woodward) or the Equal Protection Clause ("see", e.g., Brown v. Board of Education), and it has invalidated federal laws for failing to arise under the Commerce Clause of the Constitution ("see", e.g., United States v. Lopez).The Supreme Court's interpretations of constitutional law are binding on the legislative and executive branches of the federal government, on the lower courts in the federal system, and on all state courts.