The Supreme Court on Tuesday considered whether the Biden administration's restrictions on homemade firearms are consistent with the Gun Control Act (GCA) of 1968. As with the Trump administration's ban on bump stocks, which the Court rejected in June, the issue is not whether the rule violates the Second Amendment but whether it exceeds the authority that Congress gave the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF). Unlike in that case, however, most of the justices seem...