I wonder if President Trump thinks his children Donald Jr., Eric, Ivanka, and Barron are ineligible to ever serve as President?
Ivana became a US citizen in 1988, after her children were born.
Melania became a US citizen in 2006 the same year her son was born.
Personally, I'd give them a pass for a minor technicality.
BHO is a very different situation, imho.