Connell Construction Co. v. Plumbers & Steamfitters Local Union No. 100

The building trades union in this case supported its efforts to organize mechanical subcontractors by picketing certain general contractors, including petitioner. The union’s sole objective was to compel the general contractors to agree that in letting subcontracts for mechanical work they would deal only with firms that were *619parties to the union’s current collective-bargaining agreement. The union disclaimed any interest in representing the general contractors’ employees. In this case the picketing succeeded, and petitioner seeks to annul the resulting agreement as an illegal restraint on…