Trump wanted Comey to pledge his loyalty – not to the Constitution, but to Trump himself. This is redolent of the personal oath to the Führer that the German military had to take during the Nazizeit. There is an additional mime in Trump’s vilification of Comey, for it makes me think of episodes on hitlerrantsparodies.com when Hitler denounces “Fegelein, Fegelein, Fegelein!”