You misunderstand the point about a jury of one's peers.Since Magna Carta, there is a limit on what the monarch or, in the US the President and the 'Executive' , can do.
A legitimate trial means open trial by a jury of one's equals - by one's neighbours, or by those of a similar rank in society, not by the King's pals and placemen, and not behind closed doors, secretly.
The Magna Carta agreement also laid down an important safeguard in declaring that "justice delayed is justice denied".
In short, the US presidents in recent years have acted as if to destroy the traditional rights laid down in Magna Carta and subsequent key documents such as the Bill of Rights, and the American Constitution.
In so doing, they have reverted to a form of 'law' that the French revolution got rid of, along with the oubliette . And they want to be treated as if the laws that apply to others cannot be applied to them and to those who act for them.
Yet they claim to be leaders of the .'free world', fighting for 'freedom and democracy'!