Donald Trump, Jr. born December 31, 1977
His mother Ivana naturalized May 25, 1988
Donald Jr. is not a Natural Born Citizen, for the same reason Rafael isn't.
In fact none of Trumps children are NBC, except
Tiffany Ariana Trump born October 13, 1993 in New York, NY. Her mother Marla Maples born October 27, 1963 in Cohutta, GA was a citizen at Tiffany's birth.
What about Melania, when was she naturalized?