A U.S. district judge in San Francisco had temporarily blocked large-scale federal layoffs known as "reductions in force."

The high court said it had based its decision on the legality of Trump’s executive order, and didn’t rule on whether any reorganization plans broke the law.

The Supreme Court on Tuesday cleared the way for President Donald Trump’s plans to downsize the federal workforce despite warnings that critical government services will be lost and hundreds of thousands of federal employees will be out of their jobs.