The appeals court issued its pause just hours after Judge Charles Breyer wrote that Trump’s “actions were illegal." The 9th Circuit Court of Appeals will hear the case on June 17.

"By calling forth troops...the President flouts the vision of our Founders," read an amicus brief filed by 21 states.

Senior U.S. District Court Judge Charles R. Breyer said he was “trying to figure out where the lines are drawn.”