Whether the Hobbs Act covered Stirone's extortion because it threatened a concrete supplier whose business depended on interstate shipments of sand.
Holding
Yes. Interference with Rider's business could affect the interstate movement of sand into Pennsylvania and therefore fell within the Hobbs Act.
Reasoning
The Hobbs Act broadly prohibits obstructing, delaying, or affecting commerce "in any way or degree" through extortion. Congress used language designed to reach the full extent of its constitutional authority over interstate commerce.
Rider depended on sand transported from other States to operate his ready-mixed-concrete business. If Stirone's threats had crippled or destroyed that business, the interstate shipments of sand to Rider would have slowed or stopped. The jury could therefore find that Rider's payment prevented a harmful interruption of interstate commerce.
Because the interstate-sand theory supplied a sufficient jurisdictional foundation, the Court did not need to decide whether prospective steel shipments from the as-yet-unbuilt mill would independently satisfy the Hobbs Act.