In National Bank v. Insurance Company, the Supreme Court of the United States was asked to decide whether a national bank could sue an insurance company in a state court. The insurance company had refused to pay a claim to the bank, and the bank sought to recover the money in a state court. The insurance company argued that the bank was not allowed to sue in a state court because it was a national bank. The Supreme Court held that a national bank could sue an insurance company in a state court. The Court reasoned that the National Bank Act of 1864 gave national banks the right to sue in state courts. The Court also noted that the insurance company had not raised any other objections to the bank's suit, and thus the bank was entitled to sue in a state court. In conclusion, the Supreme Court held that a national bank could sue an insurance company in a state court. The Court reasoned that the National Bank Act of 1864 gave national banks the right to sue in state courts, and the insurance company had not raised any other objections to the bank's suit.

Justice Field delivered the dissenting opinion in National Bank v. Insurance Company, arguing that a national bank was not authorized to issue policies of insurance under its charter from Congress. He argued that the power to do so was not expressly granted by Congress and could not be implied from any other powers given to it. Furthermore, he argued that allowing banks such authority would lead to an abuse of their corporate privileges as well as create unfair competition with existing insurance companies who were subject to state regulations and taxes which banks were exempt from. He concluded his dissent by stating that if Congress wanted national banks to have this power they should explicitly grant it rather than imply it through other provisions in the charter or allow them free reign over all matters related to banking without any restrictions whatsoever.