In NLRB v. News Syndicate Co., 365 U.S. 695, 81 S.Ct. 849, 6 L.Ed.2d 29 (1961), where the bargaining unit included supervisors, the NLRB had found that both the employer and the union had committed unfair labor practices by operating an unlawful closed shop and preferential hiring system.
In Leeds Northrup Co. v. NLRB, 357 F.2d 527 (3d Cir. 1966), this court held that "once a complaint has issued, the charging party is entitled to an evidentiary hearing upon its objections to the proposed settlement agreement, be it formal or informal."