The Supreme Court’s opinion last week in National Pork Producers Council v. Ross raises more questions than it answers regarding what state laws might violate the dormant Commerce Clause. California prohibits the in-state sale of pork that comes from pigs raised in “cruel” conditions—even though nearly all the pork sold in California is raised in other states. The Court upheld that law in the face of a dormant Commerce Clause challenge. But the Court’s fractured reasoning makes it hard to predict how other laws might fare.
As a refresher, the Dormant Commerce Clause stems from Congress’s Article 1, Section 8 authority to regulate commerce “among the several States.” In contrast to preemption, which limits states’ authority in an area where Congress has acted, the Dormant Commerce Clause limits states’ ability to regulate even when there is no relevant congressional action.