The IAM Union and the National Federation of Federal Employees (NFFE-IAM) joined a coalition of labor unions in filing a lawsuit against the Trump Administration’s orders to gut the federal workforce. The complaint challenges the firing of probationary employees, the deferred resignation ploy to pressure employees to voluntarily resign, and large-scale reductions-in-force (RIFs) that violate federal laws.

The lawsuit calls out the administration’s reckless attacks on America’s long standing, merit-based civil service. Since Jan. 20, the administration has ordered the firing of thousands of new federal workers regardless of their skill and experience, badgered nearly 2 million federal employees to resign in fear of losing their jobs, and threatened the elimination of entire agency functions—if not the actual agency itself—and the jobs that go with them.

“When the livelihoods of IAM members are under attack, our union will always fight back,” said IAM Union International President Brian Bryant. “We are fighting for everyday workers who put their hearts and souls into doing tough, critical jobs for the American people. These are healthcare professionals caring for our military veterans, wildland firefighters protecting our lives and property, and park rangers watching after our national treasurers. If anyone thinks they can unilaterally and unconstitutionally stomp on our members’ dignity, and the vital jobs they do, we’ll see them in court.”

The lawsuit, filed in U.S. District Court for the District of Columbia, also alleges the Trump Administration is illegally undermining Congress’s authority by eliminating federal agencies and jobs that have been created and authorized by the legislative branch. The suit asks the court to declare that the mass firing of probationary and other employees and the deferred resignation program, collectively, are unlawful.

“The Trump Administration’s executive actions to gut the federal workforce are not only illegal, but will also have damaging consequences for federal employees and the public services they provide,” said NFFE-IAM National President Randy Erwin. “The courts must intervene and hold this Administration accountable for violating federal laws before it is too late. Federal workers are your friends and neighbors who have dedicated their careers to serving our country. We cannot let the President disrupt their lives and dismantle critical services relied upon by the American people.”

The IAM and NFFE-IAM are also part of a coalition suing to challenge a data heist carried out by Elon Musk’s so-called Department of Government Efficiency inside three federal government departments.