All federal employees are required to take The Constitutional Oath.
In addition to that justices of the Supreme Court of the United States are required to take a JUDICIAL OATH. Alternatively on some occasions they take a COMBINED OATH.
There is not ONE WORD anywhere that mentions the president. There is NO OATH a government employee is reuired to take to swear allegiance to ultimatum boy. What gives ultimatum boy the chutzpah to demand it? Ignorance, stupid dumb view of himself and his importance.
What's worse than that? The toady sycophants who want to give him everything he demands including loyalty to him and him alone in all things and above and beyond that of loyalty to their country and to their fellow citizens. Millions do. Are you among them?