Unions for federal workers have filed a lawsuit to block the mass firings of probationary federal employees by President Donald Trump’s administration, alleging that officials are exploiting and misusing the probationary period to eliminate staff across government agencies.

Several labor groups sued the Trump administration for allegedly firing tens of thousands of probationary employees illegally, as part of its drive to overhaul the federal government. In a complaint filed on Wednesday night in San Francisco federal court,

Letting the president boot the head of an agency protecting federal workers could enable unlawful political meddling, the judge said.