According to thehill.com, the GOP-led House just overturned a law that required the reporting of people receiveing disibility benefits for mental health conditions to the FBI background check system.
The NRA has been a longtime opponent to this rule, arguing that people with mental health issues should not be denied the Second Amendment rights without due process in court.
They also voted today to strike down a rule which required federal contractors to report labor violations to the Labor Department.
Republicans used the Congressional Review Act to overturn the gun regulation, as they did yesterday to enable mining companies to pollute public waterways and hid payments to foreign government.
They are expected to use it tomorrow to strike down the Interior Department's methane emission standards.
Under the Congressional Review Act, the Senate needs only a simple majority before the changes are sent to Trump to sign. There is no filibuster process.