In the case of James Caldwell vs. John Taggart and Mary his wife, and others, the Supreme Court was asked to decide whether a state court had jurisdiction over a dispute between two citizens of different states. The appellant argued that since he was from Pennsylvania while the respondents were from New Jersey, only federal courts could hear such cases. However, the Supreme Court disagreed with this argument and held that state courts did have jurisdiction in these matters as long as they followed proper procedures for determining which laws applied to each party's respective claims. Furthermore, it found that even though there may be some differences in how certain issues are handled by different states' laws or judicial systems, those differences do not necessarily prevent one state court from hearing disputes between parties who reside in different states.

In the case of James Caldwell v. John Taggart and Mary his wife, et al., Justice McLean wrote a dissenting opinion in which he argued that the court should have found for the appellant. He believed that under Kentucky law, when an individual purchased land from another party who did not own it at the time of sale, they were entitled to damages if they had acted in good faith. In this case, Caldwell was unaware that Taggart did not actually own the property when he bought it from him; thus, according to McLean's interpretation of Kentucky law at the time, Caldwell was due compensation for his losses as a result of buying something without title or possession rights. Furthermore, McLean noted that there was no evidence presented by either side indicating any fraud on behalf of either party involved in this transaction; therefore both parties should be held harmless and neither one should suffer any loss because their actions were done with good intentions and without malice or deceitful intent. Ultimately however Justice McLeans dissent went unheeded as all other justices voted against finding for Caldwell