An appeals court in California has refused to halt a judge’s order requiring the Trump administration to rehire thousands of federal workers who were let go in mass firings.

A split 9th U.S. Circuit Court of Appeals panel turned back an emergency motion late Wednesday to pause the order from U.S. District Judge William Alsup in a case brought by labor unions and nonprofits as Republican President Donald Trump moves to dramatically downsize the federal workforce. Alsup is one of two judges who found legal problems with the way the firings of probationary workers were carried out.

Two of the three judges on the panel ruled against the request for an emergency stay. The dissenting judge said the government had a strong argument against reinstating the workers.

The government has appealed Alsup’s order to the Supreme Court, arguing that judges cannot “micromanage” federal worker policies or force the rehiring of more than 16,000 workers. A response is due by April 3.

Alsup ordered six departments to immediately offer job reinstatement to employees terminated on in mid-February: the departments of Veterans Affairs, Agriculture, Defense, Energy, the Interior and Treasury.

The judge, who was nominated by Democratic President Bill Clinton, said the firings were an attempt by the administration to sidestep laws and regulations governing a reduction in workforce by going after probationary workers, who have fewer protections.

Alsup said he was appalled that employees were told they were being fired for poor performance despite receiving glowing evaluations just months earlier.

Probationary workers have been targeted for layoffs across the federal government because they are usually new to the job and lack full civil service protection.

Lawsuits over the firings are among the many faced by the administration. More than three dozen rulings have at least temporarily slowed Trump’s second-term agenda.

Within hours of Alsup’s ruling, a judge in Baltimore found separate legal problems with the handling of the firings. In a lawsuit brought by nearly two dozen states affected by the layoffs, U.S. District Judge James Bredar said the administration did not follow laws set out for large-scale layoffs. That case involved a wider range of agencies, and the plaintiffs estimate about 24,000 probationary workers are affected.

The administration contends that states have no right to try to influence the federal government’s relationship with its own workers. Justice Department lawyers argued that the firings were for performance issues and are not the large-scale layoffs subject to specific regulations.

White House press secretary Karoline Leavitt cast it as an attempt to encroach on the president’s power to hire and fire employees.

There are an estimated 200,000 probationary workers across federal agencies. They include entry-level employees but also workers who recently received a promotion.

Leavitt is one of three Trump administration officials who face a lawsuit from The Associated Press on First and Fifth Amendment grounds. The AP says the three are punishing the news agency for editorial decisions they oppose. The White House says the AP is not following an executive order to refer to the Gulf of Mexico as the Gulf of America.