The irony of Trump now suggesting that his former chief strategist Steve Bannon “has lost his mind” is evident. But laudable as their call may be, psychiatrists can do little more than trumpet danger—unless Twenty-Fifth Amendment proceedings determining the president “unable to discharge the powers and duties of his office” are set in motion. At that point, the vice president or the Cabinet or Congress can call for a full mental health test and diagnostic assessment. But what will guard against the president’s excesses and remove him from office is more likely to be politics than the mind doctors.