The U.S. Supreme Court appears set to uphold the Biden administration's efforts to combat a flood of untraceable "ghost guns" assembled from internet-ordered firearm kits, with even the court's conservative justices sympathetic to the government at a hearing Tuesday.

During oral arguments that lasted more than an hour, justices from across the ideological divide appeared broadly receptive to the government's defense of a 2022 rule subjecting the sale of firearms kits to the same tracking and background checks as conventional guns. The U.S. Court of Appeals for the Fifth Circuit found the rule to be unlawful.