But as was pointed out, there is a difference between "nationals" and "citizen" and "native born citizen" and "natural-born citizen."
A child born in the US to two illegal immigrants in the US is a citizen of the US, but he is not eligible for the Presidency.
The question is where is "natural-born citizen" defined?
“nationals and citizens...AT BIRTH” = “natural born”
“Natural born” is all about being “born” a citizen of the US.
Some are not “born” citizens and have to be granted citizenship at some point AFTER birth. Many believe that is the case with Obama. There is no doubt that he is NOW a citizen. The question is whether he was automatically a citizen at birth.
If his mother, 18 at the time of his birth, was overseas with her man, Obama Sr., in his native country, then BO’s mom did NOT fulfill the 5 year requirement for residency after the age of 14 listed in the law above.
I understand that to be the legal argument against BO’s “born a US citizen” status.