[NurdlyPeon]

Could you please provide a link to the law that states that in order for one to be a "natural born citizen" that both parents must be U.S. citizens at the time of their birth?

This will tell you more than you want to know. http://people.mags.net/tonchen/birthers.htm

[trumandogz]

And with all that text in that link, there does not appear to be any legislation that defines natural born citizen.

And as I recall, Chief Justice Roberts and Justices Scalia, Thomas and Alito have had multiple opportunity to take the Obama NBC case and have refused.