The U.S. Supreme Court has unanimously rejected Mexico’s effort to hold American gun manufacturers liable for cartel violence, shutting down a closely watched suit that sought roughly $10 billion in damages. The decision is a significant win for the firearms industry and a forceful reaffirmation of the Protection of Lawful Commerce in Arms Act, or PLCAA, the federal statute that broadly shields gunmakers and sellers from many civil claims arising from criminal misuse of their products.

Mexico had argued that U.S. manufacturers and distributors knowingly facilitated illegal trafficking by designing, marketing, and distributing firearms in ways that predictably supplied cartel networks.

The U.S. Supreme Court closed out a closely watched cross-border liability fight this week by unanimously rejecting Mexico’s effort to hold American gun manufacturers responsible for firearm trafficking and cartel violence south of the border.

The Justice Department has filed suit against New Jersey, Gov. Mikie Sherrill, and Attorney General Jennifer Davenport, alleging that the state’s “Law Enforcement Officer Protection Act” unlawfully restricts federal law-enforcement activity. The case, filed in federal court in New Jersey, tees up a direct confrontation over the limits of state power when federal officers operate within state borders.

At the center of the dispute is a familiar constitutional fault line: whether a state may regulate, constrain, or impose conditions on federal officials carrying out federal duties.

The Justice Department has settled a closely watched lawsuit challenging the State Department’s alleged role in funding and promoting social media censorship during the Biden administration.