Opinion of the Court
decides that the conduct is not protected or prohibited [by the NLRA] may the court entertain the litigation.” Ibid. “[W]hen properly invoked,” Garmon thus “tells us not just what law applies (federal law, not state law) but who applies it (the National Labor Relations Board, not the state courts or federal district courts).” Trollinger v. Tyson Foods, Inc., 370 F. 3d 602, 608 (CA6 2004).
C
We relay the facts as alleged in the complaint. Glacier Northwest sells ready-mix concrete to customers in Washington State. Each batch must be mixed to the customer’s specifications. After Glacier combines the raw ingredients—cement, sand, aggregate, admixture, and water—in a hopper, it transfers the resulting concrete to one of its trucks for prompt delivery.
In this business, time is of the essence. Concrete is highly perishable—it begins to harden immediately once at rest. Ready-mix trucks can preserve concrete in a rotating drum located on the back of the truck, but only for a limited time. If concrete remains in the rotating drum for too long, it will harden and cause significant damage to the truck. Worse still, the hardening begins right away if the drum stops revolving.
The International Brotherhood of Teamsters Local Union No. 174 (Union) serves as the exclusive bargaining representative for Glacier’s truck drivers. After the collective-bargaining agreement between Glacier and the Union expired in the summer of 2017, the parties negotiated in an attempt to reach a new deal. Things did not go smoothly.
“where the regulated conduct touche[s] interests so deeply rooted in local feeling and responsibility that, in the absence of compelling congressional direction,” a court cannot conclude that Congress “deprived the States of the power to act.” Id., at 244. Because we conclude that the NLRA does not arguably protect the Union’s conduct, we need not address these exceptions.
