Earlier quoted context omitted.
Which part?
I should think that it was very obvious that America does not have a dictatorial government; this is hyperbole.
Perhaps you're confused that the normal system of laws is still operating? That's just the nature of dictatorship in a large country. The dictator only has so much time in the day, and if he has to delegate anyway he might as well use the preexisting courts and civil servants. He just has to put supervisors on top who can credibly threaten to invoke his wrath if people step too far out of line.