In Lenox et al. v. Prout, the Supreme Court of the United States held that a state court had jurisdiction to hear and decide a case involving citizens of different states when it was brought in good faith by one party against another who resided in the same state as the court. The dispute arose out of an agreement between two individuals from New York, whereby one agreed to pay money owed by him to his creditor residing in Pennsylvania. When he failed to do so, his creditor sued him for breach of contract before a New York State Court and obtained judgment against him for payment plus interest and costs incurred due to litigation expenses. The debtor appealed on grounds that since both parties were not residents of New York at time suit was filed, only federal courts could have jurisdiction over such matters under Article III Section 2 Clause 1 (the diversity clause)of US Constitution which grants exclusive original jurisdiction over cases where parties are citizens or subjects from different states or foreign countries .The Supreme Court rejected this argument holding that although there may be some instances where federal courts would have concurrent jurisdiction with state courts ,in this particular instance no such situation existed because all parties involved were domiciled within same state at time action was commenced thus making it exclusively within province of said state's judicial system .

In Lenox et al. v. Prout, the Supreme Court was asked to decide whether a state court had jurisdiction over a case involving citizens of different states and foreign countries. The majority opinion held that the state court did have jurisdiction in this case because it involved property located within its borders and all parties were subject to its laws. However, Justice Story wrote a dissenting opinion arguing that the Constitution gave exclusive original jurisdiction over cases between citizens of different states or with foreign nations to federal courts only. He argued that allowing state courts to exercise such power would be an unconstitutional usurpation by those courts as well as an infringement on Congress’s authority under Article III of the Constitution which grants them exclusive control over federal judicial powers. Furthermore, he argued that if each individual state could assume such power then there would be no uniformity in decisions across jurisdictions and chaos would ensue when multiple conflicting judgments are rendered for similar cases occurring in different states at once