In a speech in Missouri, Sessions revealed he was issuing new litigation guidance that he said would “assist our Department attorneys in fighting unconstitutional orders” all the way to the U.S. Supreme Court.

Nationwide injunctions have become a favored tool by states and other groups who have staunchly opposed many of the Trump administration’s more controversial policy initiatives.

They allow a single judge in one federal district to block the implementation of new rules across the entire United States.