In the case of Armour & Company v. State of North Dakota, 1915, the U.S Supreme Court ruled in favor of Armour & Company. The issue at hand was whether a state law that prohibited corporations from owning or leasing land for farming purposes violated the Fourteenth Amendment's Equal Protection Clause. This clause prohibits states from denying any person within its jurisdiction equal protection under the law. The court found that this prohibition did indeed violate this constitutional provision because it discriminated against corporations by treating them differently than individuals with regard to property rights without sufficient justification for such differential treatment.

The dissenting opinion in the case of Armour & Company v. State of North Dakota argued that the state law, which prohibited corporations from dealing in farm products unless they were produced on land owned or leased by them, was unconstitutional. The dissenters believed this law violated the Fourteenth Amendment's Equal Protection Clause as it discriminated against out-of-state businesses and favored local ones. They also contended that it infringed upon interstate commerce rights protected under federal law. Furthermore, they asserted that such a restriction could potentially lead to monopolies within states and limit competition, thereby harming consumers who would face higher prices due to lack of market competition.