President Donald Trump took his most consequential action against federal employee unions yet late Thursday, signing an executive order aimed at ending collective bargaining for government employees whose work include national security aspects.

Long Island union leaders recently called President Donald Trump’s executive order to end collective bargaining with federal unions in agencies with national

The legal question hinges on the Civil Service Reform Act of 1978, which Trump says gives him the authority to remove collective bargaining powers from the unions owing to national security concerns. Unions such as NTEU and the American Federation of Government Employees disagree.