California, New Jersey, New York, Illinois, Massachusetts, Colorado—all states where Second Amendment freedoms have unceremoniously died or are withering. You can now add Virginia to that list. That’s right, the state of Virginia—once a firewall for the Second Amendment—is about to become a case study in what happens when gun owners sit out elections. With Democrats now controlling both of the state’s legislative chambers and the governor’s office, the Old Dominion has become ground zero for an aggressive gun-control agenda.

In what has been condemned as one of the most restrictive gun control laws in the nation, Colorado Governor Jared Polis signed Senate Bill ...