The United States Supreme Court has agreed to hear Viramontes v. Cook County and Grant v. Higgins, consolidating two cases that involve reckless gun lobby challenges to laws restricting assault weapons in Connecticut and Cook County, Illinois. Assault weapons are military-style firearms engineered for rapid firing and maximum lethality, and they are frequently used in our nation’s deadliest mass shootings. Oral arguments are scheduled for December 2, 2026. Here’s what you need to know.