The U.S. Supreme Court has narrowed the scope of federal regulations restricting firearm ownership by individuals with medical marijuana cards. The ruling clarifies that simply being a medical marijuana user does not automatically disqualify someone from possessing a gun. Previously, federal law prohibited marijuana use, and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) interpreted this to include those with state-authorized medical marijuana cards. The court found the ATF’s interpretation overbroad, stating it penalized individuals even if they weren’t actively using marijuana at the time of purchase. The decision doesn’t legalize federal marijuana use, but it does protect the Second Amendment rights of medical marijuana patients in states where its use is legal. Legal experts anticipate further litigation regarding the specifics of implementation and potential conflicts between state and federal laws.