If you think about the nature of political parties, the Trumpian view makes a certain amount of sense and what’s remarkable is that the old system lasted for long. Why is it, exactly, that former presidents have not chosen to actively maintain a grip on their political parties?
The only real explanations for the view of presidents as political stewards are humility, tradition, honor. Even Trump’s most eager apologists would never ascribe any of those traits to him. Why would he think himself constrained by such outmoded thinking?
Why would he voluntarily give up a thing of immense value?
When you look at Trump’s administration it is clear that he sees the GOP not as a political party which exists as a vehicle to execute policy visions, but an asset. And assets exist to be controlled and passed down to one’s heirs.