Baldwin v. Stark 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 habeas corpus to a prisoner held in a federal prison. The case arose when a prisoner, Baldwin, was held in a federal prison in the state of Missouri. Baldwin sought a writ of habeas corpus from the state court, claiming that he was being held in violation of his constitutional rights. The state court granted the writ, and the federal government appealed the decision to the Supreme Court. The Supreme Court held that the state court did not have the authority to issue a writ of habeas corpus to a prisoner held in a federal prison. The Court reasoned that the writ of habeas corpus was a federal prerogative, and that the state court did not have the authority to interfere with the federal government's power to imprison individuals. The Court also noted that the writ of habeas corpus was a fundamental right, and that the state court should not be allowed to interfere with the federal government's power to protect the rights of individuals. 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 held in a federal prison. The Court reasoned that the writ of habeas corpus was a federal prerogative, and that the state court did not have the authority to interfere with the federal government's power to imprison individuals. The Court also noted that the writ of habeas corpus was a fundamental right, and that the state court should not be allowed to interfere with the federal government's power to protect the rights of individuals.

Justice Field delivered the dissenting opinion in Baldwin v. Stark, arguing that the majority had misinterpreted and misapplied the law to reach its decision. He argued that under California state law, a contract was formed when an offer was accepted by both parties, regardless of whether or not any money had been exchanged yet. In this case, he argued that there was sufficient evidence to show that such a contract existed between Baldwin and Stark; therefore, it should have been enforced by the court. Furthermore, Justice Field noted that even if no formal agreement existed between them at all times prior to their dispute over payment terms for goods purchased from Baldwin’s store by Stark’s agent (as suggested by the majority), then they were still bound together through mutual promises made during negotiations leading up to their dispute - which would also constitute a valid contract under California state law. As such, Justice Field concluded his dissent with an argument for enforcing these contracts as written rather than allowing one party or another to unilaterally alter them after-the-fact without consequence.