Last December I suggested that conservatives hold off uncorking the champagne when the Supreme Court agreed to hear oral arguments on its first major gun rights case since it decided District of Columbia v. Heller in 2008 and McDonald v. Chicago two years later. On Monday, my cautionary note proved prescient. The High Court once again sidestepped providing jurisprudential support for the fundamental right to possess a firearm. In what has become a recurring theme for conservatives looking to Chief Justice John Roberts for a degree of constitutional backbone in protecting individual liberty against government overreach, he sided with the...