A judge in Washington on Tuesday blocked most of Donald Trump's executive order targeting law firm Susman Godfrey, dealing the Republican U.S. president a new legal setback in its campaign against firms he disfavors.

More than a month into Trump's war on Big Law, there is little evidence the four firms who chose to fight have suffered serious consequences.

Clients who previously had no difficulty finding representation are now being turned away by those who worry that taking the cases might risk presidential disapproval," said the group's amicus brief.