In a 6-3 decision, the Supreme Court struck down a federal law that broadly prohibited all “unlawful users” of controlled substances from possessing firearms. The ruling, delivered by Justice Clarence Thomas, stated that the Second Amendment protects the right to bear arms for individuals not shown to pose a distinctive risk of misusing them. This decision stems from the case United States v. Hemani, involving Ali Danial Hemani, a Texas man indicted for gun possession after admitting to frequent marijuana use during a 2022 FBI search of his home, where a handgun was found. The court found that the government failed to establish a historical tradition of disarming individuals based solely on drug use without a proven link to dangerous behavior.

The majority opinion clarified that while temporary disarmament of dangerous individuals has historical roots, a permanent, categorical ban on all drug users, regardless of their level of impairment or threat, is unconstitutional. Justice Samuel Alito, in a concurring opinion, highlighted the narrowness of the ruling, emphasizing that it does not preclude Congress from enacting a different law that more precisely targets drug users who are genuinely dangerous. This ruling contrasts with a 2022 Supreme Court decision that upheld a federal law prohibiting individuals subject to domestic-violence restraining orders from possessing firearms, where the government successfully demonstrated a historical basis for disarming such individuals.

The decision sends the case back to lower courts for further consideration, instructing them to apply a historical test established in the 2022 Bruen ruling, which requires gun laws to align with the nation's historical tradition of firearm regulation. The Biden administration, which had defended the blanket ban, expressed disappointment with the ruling, stating that it undermines efforts to prevent gun violence. This outcome signifies a notable win for gun-rights advocates and could influence ongoing legal challenges to various gun control measures across the country, particularly those that do not clearly connect a person's status to a demonstrated risk of violence.

The court's decision was watched closely due to its potential implications for millions of Americans, especially as marijuana is legal in many states despite remaining illegal under federal law. Attorney General Merrick Garland stated that the Justice Department remains committed to reducing gun violence and will work to interpret the ruling to identify those individuals who pose a clear risk. The case does not directly address the separate federal law that prohibits firearm possession by individuals addicted to controlled substances, but it signals the Supreme Court's growing scrutiny of broad gun restrictions based on status rather than demonstrated danger.