In the case of Philpot v. Gruninger, the Supreme Court of the United States was asked to decide whether a state court had the authority to issue a writ of habeas corpus to a prisoner who had been convicted in a federal court. The petitioner, Philpot, had been convicted in a federal court of a crime and was serving a sentence in a state prison. He sought a writ of habeas corpus from the state court, claiming that his conviction was unconstitutional. The Supreme Court held that the state court did not have the authority to issue a writ of habeas corpus to a prisoner who had been convicted in a federal court. The Court reasoned that the writ of habeas corpus was a federal remedy, and that the state court did not have the power to interfere with the federal court's judgment. The Court also noted that the writ of habeas corpus was a remedy for federal prisoners, and that the state court could not interfere with the federal court's judgment. In conclusion, the Supreme Court held that the state court did not have the authority to issue a writ of habeas corpus to a prisoner who had been convicted in a federal court. The Court reasoned that the writ of habeas corpus was a federal remedy, and that the state court did not have the power to interfere with the federal court's judgment. The Court also noted that the writ of habeas corpus was a remedy for federal prisoners, and that the state court could not interfere with the federal court's judgment.

Justice Field delivered the dissenting opinion in Philpot v. Gruninger, 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 the Constitution to pass laws regulating private contracts between citizens of different states, as this was an area traditionally left for state governments. Furthermore, he noted that if such legislation were allowed then it could be used by Congress as a means of controlling all aspects of commerce between states - something which would be unconstitutional and beyond their powers granted by the Constitution. In conclusion, Justice Field argued that allowing such legislation would create an imbalance in power between state and federal government which should not be tolerated or encouraged.