In the United States v. Thomas S. Reyburn, the Supreme Court was tasked with deciding whether a state court had jurisdiction over a case involving an alleged violation of federal law that occurred on board a ship in navigable waters within its boundaries. The defendant argued that since he was charged with violating federal laws, only the federal courts had jurisdiction to hear his case and not the state court where it originated from. The Supreme Court disagreed and held that states have concurrent jurisdiction over cases involving violations of both state and federal laws occurring on ships within their territorial limits, as long as such violations are punishable by both jurisdictions. This ruling established precedent for how future cases concerning maritime crimes should be handled in regards to jurisdictional issues between states and the Federal government

In the case of United States v. Thomas S. Reyburn, the Supreme Court was asked to decide whether a federal court had jurisdiction over a libel suit brought by an individual against another individual for publishing false and malicious statements about him in a newspaper. The majority opinion held that it did not have such jurisdiction because Congress had not granted it any power to hear cases involving private individuals suing each other for libel or slander. Justice McLean dissented from this ruling, arguing that under Article III of the Constitution, Congress has broad authority to grant original jurisdiction over civil suits between citizens of different states and therefore could give federal courts the power to hear these types of cases if they so chose. He further argued that since state laws on libel were inconsistent with one another, there should be some uniformity in how these matters are handled at the national level and thus allowing federal courts to handle them would be beneficial overall.