In the case of Ramsey et al., DBA Leon Nunley Coal Co., et al. v. United Mine Workers of America, 1970, the Supreme Court ruled in favor of the United Mine Workers (UMW). The dispute arose when a small coal company claimed that UMW had violated antitrust laws by coercing mine owners into signing labor contracts. The court held that union activities are exempt from antitrust laws as long as they are related to legitimate labor objectives such as improving wages and working conditions for their members. This ruling reinforced previous decisions establishing this exemption and clarified its application in cases where unions may have used aggressive tactics to achieve their goals.

In the dissenting opinion for Ramsey et al., DBA Leon Nunley Coal Co., et al. v. United Mine Workers of America, Justice Black disagreed with the majority's decision to uphold a lower court ruling that held unions liable for damages caused by strikes in violation of no-strike clauses in collective bargaining agreements. He argued that this interpretation was inconsistent with federal labor law and policy which encourages free and unimpeded negotiation between employers and employees without interference from courts or other outside parties. He also contended that holding unions financially responsible for strike-related damages could potentially bankrupt them, thereby weakening their ability to effectively represent workers' interests in negotiations with employers. Furthermore, he expressed concern about the potential chilling effect on future union activities if they were constantly under threat of litigation and financial ruin due to actions taken during strikes.