This is how dynastic succession is organised!
King Donald the 1st. The first King in the USA since Mad George the Hanoverian.
To be followed by his eldest son, Donald Junior, as King Donald the 2nd.
UNLESS Donald Jnr is removed from the scene by his ambitious sibling, Eric the Hunter. A long established and respected method of gaining a crown.
So the Republic looks like dying as a new monarchy is being born.
Unless some lean and hungry man begins plotting.