On Tuesday, the Supreme Court heard oral arguments in United States v. Rahimi, a case that could dramatically expand gun rights and have deadly consequences for victims of domestic violence. It’s the first major gun-rights case since the Court’s conservative supermajority broadened the scope of the Second Amendment last year, saying courts must use “the historical tradition” as the standard to evaluate whether gun regulations are unconstitutional. Rahimi will determine whether that decision invalidates a law banning people subject to domestic-violence restraining orders from owning firearms.