The decision marked the first time a federal judge permanently blocked the Trump administration from enforcing an order to punish law firms he opposes politically.
A federal judge ruled on Friday that an executive order President Trump signed in March targeting the law firm Perkins Coie was unconstitutional and directed the government not to enforce its terms, which had threatened to upend the firm’s business.
The ruling was the first time a court had stepped in to permanently bar Mr. Trump from trying to punish a law firm he opposes politically.
