In Ex Parte In the Matter of Duncan N. Hennen, the Supreme Court was asked to decide whether a state court had jurisdiction over a case involving two citizens from different states. The plaintiff, Hennen, was a citizen of Tennessee and the defendant was a citizen of Kentucky. The dispute arose when Hennen sued for damages after he claimed that his property in Kentucky had been wrongfully taken by the defendant without due process or compensation. After reviewing both sides’ arguments, Chief Justice Taney concluded that it would be unconstitutional for one state to exercise jurisdiction over another state's citizens and thus dismissed the suit on jurisdictional grounds. He reasoned that since each state is sovereign within its own borders and has exclusive authority over its own citizens, no other state can interfere with those rights unless expressly authorized by Congress or through an interstate compact between two states. This decision established important precedent regarding federalism and limited government power in matters concerning individual rights among states

In Ex Parte In the Matter of Duncan N. Hennen, Chief Justice Taney delivered a dissenting opinion in which he argued that Congress did not have the power to grant exclusive jurisdiction over land disputes between citizens of different states to federal courts. He reasoned that such an action would be unconstitutional because it would interfere with state sovereignty and deprive individuals of their right to trial by jury as guaranteed by the Seventh Amendment. Furthermore, he argued that if Congress had intended for this type of dispute resolution to take place in federal court, they should have explicitly stated so when passing legislation related to public lands. As such, Taney concluded that the Supreme Court lacked authority over this case and should dismiss it without ruling on its merits.