The retreat by the Justice Department effectively allowed a pillar of the Prohibition-era National Firearms Act to lapse.
Related stories
'Welcome to one of the most bizarre by-elections in recent history'
Watch: Counting under way in Clacton by-election
Homeland Security Paid $464 Million for Airplanes. Then It Parked Them.
Appeals Court Sidesteps Key Question Over Trump’s Use of Alien Enemies Act
Trump Gives Green Light to U.S. Companies to Aim Hacks at Cybercriminals
Inside the Democratic Socialists of America’s Audacious Quest for Power