Democrats in Congress like Representatives Jamie Raskin, D-Md., and Maxine Waters, D-Calif., are criticizing President Donald Trump’s firing of 17 inspectors general, including in the departments of State, Transportation, Labor, Interior, Energy, and Commerce, claiming that doing so “without due cause is antithetical to good government.” There is a very strong argument to be made that those inspectors general failed to do their jobs during the past four years. Their failures provide Trump with all of the “due cause” he needs. Just two examples suffice: their failure to investigate the misbehavior of their departments in attempting to interfere in the...