In the case of National Labor Relations Board v. Truck Drivers Local Union No. 449, International Brotherhood of Teamsters, Chauffeurs, Warehousemen and Helpers of America, A.F.L., the Supreme Court ruled in favor of the National Labor Relations Board (NLRB). The dispute arose when a local union initiated a secondary boycott against an employer who was not directly involved in their labor dispute. This action violated Section 8(b)(4)(A) of the Taft-Hartley Act which prohibits unions from engaging in such activities to force neutral parties into supporting them during labor disputes. The NLRB sought enforcement for its cease-and-desist order against this activity by appealing to federal courts after it was initially dismissed by lower courts on jurisdictional grounds due to lack of direct economic impact on commerce as required under NLRA provisions for court interventions. However, upon reaching Supreme Court level review it held that indirect burdening or affecting commerce is also within purview and hence ordered compliance with NLRB's directives thereby upholding broad interpretation scope for NLRA's applicability.

In the dissenting opinion for the National Labor Relations Board v. Truck Drivers Local Union No. 449 case, Justice Frankfurter argued that labor disputes should be resolved through collective bargaining rather than court intervention. He believed that the majority's decision to uphold an injunction against a union engaged in a secondary boycott was inconsistent with previous rulings and undermined federal labor policy favoring voluntary resolution of conflicts between employers and employees. Furthermore, he contended that Congress had not intended for courts to interfere in such matters when it enacted the Taft-Hartley Act, which outlawed certain types of strikes but did not explicitly authorize judicial interference in all cases involving those prohibited activities.