In the United States Supreme Court case of The United States v. John C. McLemore, the appellant argued that a certain tract of land in Alabama belonged to them due to an Indian treaty from 1805 and subsequent acts by Congress. The respondent claimed ownership through a Spanish grant issued before the treaty was signed and thus had superior title rights over those granted by Congress after it was signed. The court ruled in favor of McLemore, finding that his claim under Spanish law predated any claims made under American law and therefore he held superior title rights to the property at issue. This decision established precedent for future cases involving conflicting titles between foreign governments and states or territories within America's borders, as well as reaffirming existing principles regarding treaties with Native Americans being subject to pre-existing laws when they are entered into force.

In the case of The United States v. John C. McLemore, the Supreme Court was asked to decide whether a federal court had jurisdiction over an action brought by a state against a citizen of another state for trespass on land located in that other state. In this instance, McLemore had been sued by Tennessee for trespassing on lands owned by citizens of Mississippi and located within its borders. The majority opinion held that such suits were not cognizable in federal courts because they did not arise under any law or treaty made pursuant to the Constitution and thus could only be heard in state courts where it originated from. However, Justice McLean dissented arguing that since Congress has exclusive power over interstate commerce and disputes between states, it should have authority to hear cases involving property rights across different states as well; otherwise there would be no way for individuals who own property outside their home-state to protect themselves from being wronged without having recourse through either party's respective judicial system. He further argued that if Congress is unable to provide relief then those affected will suffer irreparable harm due to lack of legal protection which goes against what our founding fathers intended when creating our government structure with three separate branches: legislative, executive and judicial powers all working together towards justice for all citizens regardless of geographical boundaries or political affiliations