On December 2, the Supreme Court will consider constitutional challenges to "assault weapon" bans in Connecticut and Cook County, Illinois, that cover widely owned rifles, including the AR-15. As the plaintiffs in those consolidated cases see it, such laws plainly violate the Second Amendment because they prohibit arms in common use for lawful purposes. In briefs filed on Wednesday, Connecticut and Cook County urge the justices to reject that test, saying a weapon's popularity is not dispositive. The relevant question, they say, is whether their rifle restrictions fit a historical tradition of banning "unusually dangerous weapons."
Cook County and Connecticut have the burden of showing that their laws are "consistent with this Nation's historical tradition of firearm regulation," the test established by the Supreme Court's 2022 decision in New York State Rifle & Pistol Association v. Bruen. On the face of it, that is a daunting challenge.