[mlo]

"The only child of Donald Trump with two citizen parents is Tiffany."

The two citizen parents thing is a made up birther thing. There is no such requirement in the actual law.

[Lurkinanloomin]

The natural born citizen requirement is in the Constitution.

One can only naturally be born a US citizen when there is no alternative to being anything else, born here of citizen parents.
Foreign parents bring foreign citizenships.

[Verginius Rufus]

Woodrow Wilson's mother was born in Carlisle, England, and was brought to America as a child. I don't think anyone argued that Wilson was not a natural born citizen.

Of course Wilson is unique in another way--he is the only President born after 1776 who did not consider himself a citizen for the US for part of his life (1861-1865). Well, other than Barry Soetoro.