In the case of California v. Latimer et al., 1938, the Supreme Court ruled on a dispute regarding taxation and interstate commerce. The State of California had imposed a tax on oil companies for every barrel of oil produced within its borders. However, some of this taxed oil was then shipped to other states for sale. The defendants, including Latimer and several major oil corporations, argued that this constituted double taxation - once by California at production and again by the state where it was sold - which violated their rights under the Commerce Clause of the U.S Constitution. The Supreme Court disagreed with these arguments in favor of upholding California's right to impose such taxes as part of its sovereign power over natural resources within its territory. It held that there was no violation because each state's tax applied at different stages (production vs sale) and thus did not constitute double taxation or interfere with interstate commerce unduly.

The dissenting opinion in the case of California v. Latimer et al., 1938, argued that the majority's decision to uphold a tax on oleomargarine violated principles of federalism and encroached upon states' rights. The dissenters contended that Congress had not intended for its power to regulate interstate commerce to be used as a means of imposing taxes on goods after they had reached their destination state. They believed this interpretation was an overreach by the federal government into areas traditionally reserved for state regulation, such as taxation and public health policy. Furthermore, they expressed concern about potential implications for future cases if this precedent were allowed to stand unchallenged.