The U.S. Supreme Court case State of Missouri ex rel. St. Louis, Brownsville & Mexico Railway Company v. Taylor (1924) revolved around the issue of whether a state court could enjoin a federal agency from carrying out its duties under federal law - in this instance, the Interstate Commerce Commission's (ICC) decision to allow railway companies to increase their freight rates by 5%. The plaintiff, St. Louis, Brownsville & Mexico Railway Company sought an injunction against Judge Taylor who had issued orders preventing them from implementing these increased rates as per ICC's ruling on grounds that it violated Missouri laws prohibiting such increases without prior approval from state authorities. The Supreme Court ruled in favor of the railway company stating that while states have power over local matters and can regulate intrastate commerce within their borders; they cannot interfere with or control interstate commerce which falls under federal jurisdiction according to the Constitution’s Supremacy Clause and Commerce Clause respectively. This landmark decision reinforced supremacy of Federal Law over conflicting State Laws when dealing with issues related to interstate commerce thereby upholding principles laid down by US constitution.

In the dissenting opinion for the case of State of Missouri ex rel. St. Louis, Brownsville & Mexico Railway Company v. Taylor, it was argued that the majority's decision to uphold a state law requiring railway companies to maintain offices within their operating states violated principles of federalism and interstate commerce protections under the U.S Constitution. The dissent contended that such laws unduly burdened railroads by forcing them into unnecessary expenditures and administrative complexities without any clear public benefit or necessity justifying these burdensome requirements. Furthermore, they believed this ruling could set a dangerous precedent allowing states to impose arbitrary restrictions on businesses engaged in interstate commerce which would undermine national economic unity and efficiency.