Douglas Adams nailed it [The Hitch-hikers Guide to the Galaxy (Pan Books, 1979)]:
But it was not in any way a coincidence that today, the day of culmination of the project, the great day of unveiling, the day that the Heart of Gold was finally to be introduced to a marvelling Galaxy, was also a great day of culmination for Zaphod Beeblebrox. It was for the sake of this day that he had first decided to run for the Presidency, a decision which had sent shock waves of astonishment throughout the Imperial Galaxy – Zaphod Beeblebrox? President? Not the Zaphod Beeblebrox? Not the President? Many had seen it as clinching proof that the whole of known creation had finally gone bananas.
… It might have made much difference to them if they’d known exactly how much power the President of the Galaxy actually wielded: none. Only six people in the Galaxy knew that the job of Galactic President was not to wield power but to attract attention away from it.
If he wants a peaceful life, Donald Trump (Not the Donald Trump? Not the President?) should take heed and learn his rightful place.