Well it’s an interesting thing you should ask that. Because my country of birth is not my country of citizenship. I am a citizen of my country by descent. As a direct result, my children are not eligible for citizenship to my country, because the right to citizenship by descent only extends one generation and that was me. US citizens is what my children are, and it is all they can be. So tell me again why it is they can’t grow up to be president?
Allegiance in the sense of legal obligation appears to have been the overarching concern, and seeing as how no amendment has altered the original intent of the clause, it remains the concern. So, if you want to find out if your children will be able to be President some day, I suggest you take the issue of a foreign citizen parent up in a court with the proper jurisdiction.
That jurisdiction thing can be a real stickler, you know what I mean?