In Schlesinger v. Beard, the United States Supreme Court was asked to decide whether a state court had the authority to issue an injunction against a federal officer. The case arose when the plaintiff, Schlesinger, sought to enjoin the defendant, Beard, from enforcing a federal statute that prohibited the sale of liquor in the state of Pennsylvania. The state court had issued an injunction against Beard, but Beard argued that the state court lacked the authority to do so. The Supreme Court held that the state court did not have the authority to issue an injunction against a federal officer. The Court reasoned that the federal government had exclusive authority over matters of federal law, and that the state court was not authorized to interfere with the enforcement of federal statutes. The Court further held that the state court's injunction was void because it was in direct conflict with the federal statute. The Court's decision in Schlesinger v. Beard established the principle that state courts cannot interfere with the enforcement of federal statutes. This decision has been cited in numerous subsequent cases, and it remains an important precedent in the area of federal-state relations.

In Schlesinger v. Beard, the Supreme Court was tasked with determining whether a contract between two parties was enforceable under Pennsylvania law. The majority opinion held that the contract in question was not valid because it violated public policy and did not meet certain requirements of state law. Justice Field dissented from this decision, arguing that there were no legal grounds to invalidate the agreement and that both parties had acted in good faith when entering into it. He argued further that if one party could be allowed to escape their obligations due to an alleged violation of public policy or some other technicality, then contracts would become unreliable and unenforceable as a whole. Thus, he concluded that since neither party had engaged in any fraudulent behavior or otherwise broken any laws related to their agreement, they should be held accountable for its terms according to its plain language without regard for extraneous considerations such as public policy concerns