The President is supposed to be an administrator. Too bad President Trump doesn’t know this. (The President is not a king)
In the Executive Branch, the President is responsible for the quality of the cabinet level processes. He is not in charge of them, he is responsible for them. Which means if they are not working, he is supposed to do something about that. The President is supposed to faithfully execute the administration of laws in the United States.
Unfortunately, Presidents always want to be in charge and bend the laws to meet their personal agendas. Nobody cares if he/she adds a little emphasis here or there, but President Trump believes the cabinet should accede to his wishes like they were marketing or operations departments.
He doesn’t care about the law. His opinion is better than the law. Just ask him.