It's nothing to do with nepotism if its royalty , Ivanka would be princess and Melania's son is a Barron.
Elizabeth Christ Trump (born Elisabeth Christ) is considered the matriarch of the Trump family. She married Frederick Trump in 1902.

Royalty is just institutionalised nepotism!

No it came from Popes appointing their sons and nephews. As a Christ, Trump has a chance.

Dynastic rule - where power was handed down in families - long predates the popes. Think of the Chinese dynasties and the Egyptian Pharoahs. The most interesting parallel with America is the Roman Empire where a republic was replaced by the dynastic rule of a series of imperial families. https://en.wikipedia.org/wiki/List_of_Roman_emperors#(27_BC_–_68_AD)_Julio-Claudian_dynasty.

Trump's leading most of you by the nose. I find that amusing to watch. But my better angels suggested I post this link. Might give you a better understanding what he is about. https://www.theaustralian.com.au/news/world/the-times/crazed-liberal-critics-only-give-donald-trump-a-boost/news-story/3f9b6b0daf43908814f4139a258454ef

Cossomby
The term "nepotism" relates to Popes and even "Julius Nepos who was appointed Western Roman Emperor in early 474 by the Eastern Roman Emperor Leo I. Nepos was married to Leo's niece, but also himself was the nephew of the sovereign governor of Dalmatia, Marcellinus, hence nepos — "nephew"."

Caesars were not royals and chose successors at will which was nepotism. A "king" by definition is a "kinsman" and passes on his property to family which is lawful and not fake trumped-up nepotism.