Mayfield v. Richards & Others was a United States Supreme Court case that dealt with the issue of whether a state court had the authority to issue a writ of mandamus to a federal court. The case arose when the plaintiff, Mayfield, sought to have the state court issue a writ of mandamus to the federal court to compel the latter to hear a case that had been dismissed by the federal court. The Supreme Court held that the state court did not have the authority to issue a writ of mandamus to the federal court. The Court reasoned that the state court lacked the power to interfere with the proceedings of the federal court, and that the writ of mandamus was an inappropriate remedy for the plaintiff's complaint. The Court further held that the state court lacked the power to review the decisions of the federal court. The Court concluded that the state court lacked the authority to issue a writ of mandamus to the federal court, and that the plaintiff's complaint must be addressed in the federal court.

Justice Field delivered the dissenting opinion in Mayfield v. Richards & Others, arguing that the majority's decision was contrary to established precedent and would lead to a dangerous expansion of federal power. He argued that Congress had no authority under Article III of the Constitution to pass legislation granting exclusive jurisdiction over cases involving admiralty law, as it did with this case. Furthermore, he stated that if such an interpretation were allowed then Congress could grant exclusive jurisdiction for any type of case they wished without limitation or restriction from judicial review. This would be a violation of separation-of-powers principles and undermine state sovereignty by allowing federal courts to hear all types of cases regardless of their origin or subject matter. Justice Field concluded his dissent by stating that while he agreed with some aspects of the majority opinion, its overall conclusion was wrong and should not stand as binding precedent on future generations.