Centrally, I cannot interfere in states.
In matters of business deal only with the commander of the army, column, or party in which you serve. Never give orders to anyone at all, and reserve your directions or advice for the C.O., however great the temptation (for efficiency’s sake).
Lawrence of Arabia
An attorney general's duty is to render her opinion and honest advice; she cannot set herself up as a judge overruling the president's decision. The president need not 'convince' his subordinate that his decision reflects the best view of the law.
A delegate cannot have a delegate. Vicarius non habet vicarium.
just as the moon derives its light from the sun and is indeed lower than it in quantity and quality, in position and in power, so too the royal power derives the splendor of its dignity from the pontifical authority...
The line has not been exactly drawn which separates those important subjects, which must be entirely regulated by the legislature itself, from those of less interest, in which … power may be given to those who are to act under such general provisions to fill up the details.
Only the President may invoke executive privilege but just about any of his subordinates may exercise it—they simply do not employ the forbidden words.
Even under absolute princes, the subordinate government of cities is commonly republican while that of counties and provinces is monarchical.