President Donald Trump has unleashed an escalating series of threats against opponents of his agenda, a move the president’s supporters claim is helping him maintain control.

Earlier this week, Trump joined a growing chorus of Republicans calling for the impeachment of federal judges who pushed back on his executive actions, specifically targeting U.S. District Judge James Boasberg for ordering the administration to halt any deportations linked to Trump’s invocation of the Alien Enemies Act earlier this month. Meanwhile, Republican lawmakers have begun introducing articles of impeachment against a number of federal judges who have ruled against Trump.