Weber v. Anheuser-Busch, Inc.

Background

A national machinists union and a rival millwrights union fought over who should do millwright work at a St. Louis beer manufacturer. The employer had contracts with the machinists’ union that affected which contractors were hired, negotiations broke down, and the machinists struck. The employer filed a federal unfair-labor charge and then sued in state court, alleging the picketing was an illegal secondary boycott and a restraint of trade; a Missouri court issued and later upheld a permanent injunction against the machinists.

Reasoning

The core question was whether the state court could enjoin the union when federal labor law and the National Labor Relations Board (NLRB) have primary authority. The Court explained the NLRB must be allowed to decide first whether the union’s conduct violated specific federal unfair-labor rules or was protected concerted activity. Because the employer itself alleged federal labor violations and the facts could fall within the federal law’s prohibitions or protections, the state court should have declined jurisdiction. The Court reversed the state decision and returned the case for further proceedings consistent with federal primacy.

Real world impact

The ruling means states cannot step in with broad injunctions when an employer’s complaint raises federal unfair-labor issues that the NLRB could decide. Unions, employers, and state courts must expect the NLRB to resolve such disputes first. This decision does not decide the final merits of who was right about the picketing; it requires federal processes to run their course before state courts act.