In the 1974 case National Labor Relations Board v. J. Weingarten, Inc., the U.S Supreme Court ruled in favor of the National Labor Relations Board (NLRB), establishing what is now known as "Weingarten Rights" for unionized workers. The case arose when an employee of J.Weingarten, Inc., was denied her request to have a union representative present during an investigatory interview which she reasonably believed might result in disciplinary action against her. The NLRB held that this denial violated Section 7 of the National Labor Relations Act, which guarantees employees "the right to self-organization, to form, join or assist labor organizations." On appeal by Weingarten's employer, the Supreme Court affirmed NLRB’s decision and held that an employee has a statutory right under Section 7 of NLRA to insist upon union representation during such interviews and refusal by employers constitutes unfair labor practices.

In the dissenting opinion for the case of NATIONAL LABOR RELATIONS BOARD v. J. WEINGARTEN, INC., Justice Powell argued that the majority's decision to allow union representation during investigatory interviews was an unwarranted extension of Section 7 rights under the National Labor Relations Act (NLRA). He contended that this ruling would disrupt employer-employee relationships and impede effective management by imposing unnecessary constraints on routine investigations into employee misconduct. Furthermore, he expressed concern over potential delays in disciplinary action due to difficulties coordinating schedules between employees, their chosen representatives, and management personnel. Lastly, Justice Powell pointed out that there are already established procedures for dealing with unfair labor practices which provide sufficient protection for workers' rights without requiring union presence at every investigatory interview.