For all the things Trump is, a keen student of the lessons of history isn't one of them, yet he seems more than willing to adopt several customs from monarchy's Renaissance "glory days."
Yes, the Louis XIV used his self-ordained rules of etiquette as a lever for establishing his primacy among the nobility. It worked for him and it was a palpably critical glue for maintaining the
ancien regime. That said, the system top down rulemaking evinced by XIV's behavioral edicts, once called into question by a liberty loving populace, the whole system shattered.
Of course, the French Revolution cannot be singularly blamed on the persistence and subsequent marginalization of fiats stipulating the nature of interpersonal behavior. Nonetheless, the very instant the people at the top dispense (for whatever reason) with adhering to the system, it's but a matter of time before the masses demand equal discretion in doing so. Then the revolt begins. In Louis XVI's reign, that person was none other than queen herself.
Louis understood this and was able to live it. His successors were not. I don't seen any evidence that Trump has the level of political integrity that Louis XIV did.
It is in your interest, brother, that the majesty of the throne should not be weakened or altered; and if, from Duc d'Orleans, you one day become King of France, I know you well enough to believe that you would never be lax in this matter. Before God, you and I are exactly the same as other creatures that live and breathe; before men we are seemingly extraordinary beings, greater, more refined, more perfect.
The day that people, abandoning this respect and veneration which is the support and mainstay of monarchies,--the day that they regard us as their equals,--all the prestige of our position will be destroyed. Bereft of beings superior to the mass, who act as their leaders and supports, the laws will only be as so many black lines on white paper, and your armless chair and my fauteuil will be two pieces of furniture of the selfsame importance.
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Memoirs of Madame la Marquise de Montespan (Complete), The Marquise recounting Louis XIV's response to his brother, Prince Philippe, Duc d'Orleans' request for an armed chair next to the king's.