Per Article 2, Section 1 of the U.S. Constitution, one must be a natural born American citizen to serve as President. Barack Obama is NOT eligible for the Presidency because he is not a natural born citizen. The law that applied during the time of Obama’s birth (in effect from December 24, 1952 to November 13, 1986) stated- “If only one parent was a U.S. citizen at the time of your birth, that parent must have resided in the United States for at least ten years, at least five of which had to be after the age of 16.” Obama’s father was a Kenyan citizen (a British Colony) and his mother just 18 at Obama’s birth...” (thus, she would have had to have been 21 in order for Obama to be eligible). John A. Bingham, primary framer, 14th Amendment, states- “Every human being born within the jurisdiction of the United States of parents not owing allegiance to any foreign sovereignty is, in the language of your Constitution itself, a natural born citizen.” Obama himself has stated that he is the son of a Kenyan- Kenya being a foreign sovereignty. Thus, Obama is not a natural born citizen even if he were actually born in Hawaii.
Both parents must be U. S. citizens for the child to be a natural born citizen, so that statute does not apply.
He is not a NBC because his father was not a U. S. citizen. Obama might or might not be a U. S. citizen, but that is irrelevant to the issue of whether he is a natural born citizen of the U. S.