WASHINGTON (Reuters) – Donald Trump’s administration asked the U.S. Supreme Court on Monday to halt a judicial order blocking mass job cuts and the restructuring of agencies, part of the Republican president’s campaign to downsize and reshape the federal government.

The Justice Department’s request came after San Francisco-based U.S. District Judge Susan Illston blocked large-scale federal layoffs, known as “reductions in force,” in a May 22 ruling siding with a group of unions, non-profit groups and local governments that challenged the administration.

The case involves the U.S. Departments of Agriculture, Commerce, Health and Human Services, State, Treasury and Veterans Affairs, among others.

Trump directed federal agencies in February to “promptly undertake preparations to initiate large-scale reductions in force” as part of his administration’s restructuring plans.

Illston wrote in her ruling that Trump had exceeded his authority in ordering the downsizing.

“As history demonstrates, the president may broadly restructure federal agencies only when authorized by Congress,” Illston wrote.

Judge Blocks 20 Agencies From Making Mass Layoffs

Illston on May 9 had initially blocked about 20 agencies from making mass layoffs for two weeks and ordered the reinstatement of workers who had lost their jobs. She continued most of that relief in her May 22 ruling.

The San Francisco-based 9th U.S. Circuit Court of Appeals in a 2-1 ruling on May 30 denied the Trump administration’s request to halt the judge’s ruling.

The 9th Circuit said the administration had not shown that it would suffer an irreparable injury if the judge’s order remained in place and that the plaintiffs were likely to prevail in their lawsuit.

“The executive order at issue here far exceeds the president’s supervisory powers under the Constitution,” the 9th Circuit wrote, calling the administration’s actions “an unprecedented attempted restructuring of the federal government and its operations.”

Trump’s administration has sought relief from the Supreme Court in a growing number of cases following rulings by lower courts impeding various policies since he returned to office in January.

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(Reporting by John Kruzel; Editing by Will Dunham)