Petitioner, a passenger engineer employed by respondent railroad corporation (Amtrak), belongs to the United Transportation Union (UTU) rather than to respondent Brotherhood of Locomotive Engineers (BLE), the union that represents Amtrak engineers for collective-bargaining purposes. Petitioners request that the UTU be allowed to represent him at a company-level disciplinary hearing was denied on the ground that, under the BLE-Amtrak collective-bargaining agreement, only the BLE could undertake such representation. Petitioner represented himself at the hearing and received a 30-day suspension for violating company work rules, which he did not appeal to the National Railroad Adjustment Board. He then filed suit in Federal District Court seeking declaratory and injunctive relief against Amtrak and the BLE on the ground that their refusal to allow his representation by the UTU at the hearing violated his rights under the Railway Labor Act (RLA). The court dismissed the complaint after a bench trial, and the Court of Appeals affirm