In the case of Best v. Polk, the Supreme Court of the United States was asked to decide whether a state could impose a tax on the sale of goods imported from another state. The plaintiff, Best, was a resident of the state of Mississippi and had purchased goods from the state of Louisiana. The state of Mississippi had imposed a tax on the sale of goods imported from other states, and Best argued that this tax was unconstitutional. The Supreme Court held that the tax was unconstitutional. The Court reasoned that the Constitution of the United States grants Congress the power to regulate commerce between the states, and that this power includes the power to regulate the taxation of goods imported from other states. The Court held that the state of Mississippi had no authority to impose a tax on goods imported from another state, and that the tax was therefore unconstitutional. The Court's decision in Best v. Polk established an important precedent in the area of interstate commerce. The Court's decision made clear that states cannot impose taxes on goods imported from other states, and that Congress has the exclusive power to regulate interstate commerce. This decision has been cited in numerous subsequent cases involving the regulation of interstate commerce.

Justice Field delivered the dissenting opinion in Best v. Polk, arguing that the majority's decision was contrary to both precedent and common sense. He argued that a state cannot be held liable for damages caused by its officers when they are acting within their authority as agents of the state, even if those actions were illegal or unconstitutional. Furthermore, he noted that it would be unfair to hold states responsible for such acts since they have no control over them and could not prevent them from occurring in any way. Finally, Justice Field argued that allowing suits against states would open up a Pandora’s box of litigation which could potentially bankrupt many states due to their inability to pay out large judgments against them without legislative approval. In conclusion, Justice Field believed this ruling should be overturned because it violated established legal principles and created an untenable situation where states may become financially insolvent due to lawsuits brought against them by individuals seeking redress for wrongs committed by government officials while acting on behalf of the state itself.