Harden v. Fisher et al. was a case heard by the United States Supreme Court in 1816 that concerned the rights of creditors to collect debts from debtors who had moved out of state after incurring their debts. The plaintiff, Harden, argued that he should be allowed to sue his debtor in federal court since they were now living in different states and thus could not be sued under state law due to lack of jurisdiction. The defendant argued that such an action would violate Article IV Section 1 of the Constitution which prohibits one state from passing laws which affect citizens or property located outside its borders. After much deliberation, the Supreme Court ultimately sided with Harden and held that creditors have a right to pursue debtors across state lines as long as it does not interfere with another State's sovereignty or infringe on any other Constitutional provisions. This ruling established important precedent for interstate commerce and has been cited numerous times throughout American legal history ever since then

In the case of Harden v. Fisher et al., Chief Justice John Marshall delivered a dissenting opinion in which he argued that the Court should not have granted an injunction to prevent state court proceedings from taking place. He noted that, while it was true that federal courts had jurisdiction over cases involving citizens of different states, this did not mean they could interfere with ongoing state court proceedings. Furthermore, he argued that granting such injunctions would be contrary to public policy and would undermine the authority of state courts by allowing federal judges to override their decisions without any clear legal basis for doing so. In conclusion, Marshall asserted that if Congress wanted federal courts to have such power then it must pass legislation explicitly authorizing them to do so; otherwise, they should respect the autonomy of each individual State's judicial system and allow its own laws and procedures take precedence whenever possible.