In the case of Houston Coal Company v. United States (1922), the Supreme Court ruled in favor of the U.S government, upholding a tax imposed on coal companies. The Houston Coal Company had challenged this tax, arguing that it was unconstitutional because it violated their Fifth Amendment rights to due process and equal protection under law. They contended that they were being unfairly singled out for taxation while other industries were not similarly taxed. However, the court disagreed with these arguments and upheld the constitutionality of such taxes as long as they are applied uniformly across an industry or class of goods or services. This ruling affirmed Congress's power to levy taxes on specific industries without violating constitutional protections against arbitrary discrimination.

In the dissenting opinion for Houston Coal Company v. United States, Justice McReynolds disagreed with the majority's interpretation of Section 15 of the Clayton Act. He argued that this section was intended to protect laborers and farmers from oppressive practices by corporations, not to provide a means for businesses to sue each other over price disagreements. According to him, allowing such lawsuits would lead to an overwhelming number of cases in courts and could potentially destabilize business relationships across industries. Furthermore, he contended that it is inappropriate for courts to intervene in pricing disputes between private entities unless there is evidence of fraud or coercion involved. In his view, these matters should be left up to market forces rather than judicial intervention.