But to reward descendants for an accident of birth is “not only groundless and absurd but often hurtful to that posterity”.
Mr Trump may still resent the fact that he had to sack his first national security adviser, Michael Flynn, for fibbing about contacts with the Russians.
But the systems of control and accountability that caught Mr Flynn, starting with a free press, did Mr Trump a favour.
In contrast, any hint of disrespect for a Trump child provokes indignation from the president, so that few Republicans in Congress care to exercise robust oversight of his daughter, Ivanka, or her husband, Jared Kushner, who both serve as senior advisers, with Mr Kushner wielding influence over dossiers from domestic economics to peace in the Middle East.
Struggling to engage with a nationalist, America First president with a limited attention-span, foreign governments are learning to use his family to sway him.