A natural born citizen is one who is born ON US SOIL to TWO PARENTS WHO ARE CITIZENS.
His father was not a US citizen. He is not a NBC. Even if he was born in the US which he probably was not.
There’s no requirement for US Soil (besides John McCain born in Panama, George Romney— Mitt’s dad— ran for President and he was born in Mexico to American parents). And the law imposes no requirement for two parents who are citizens. Even if the President was born in Kenya since father was a bigamist, he was born out of wedlock. There the President was a Natural born citizen because, per the code cited above, his mother was a US citizen who had lived for at least a year in the United States.
Unless you start making up your own version of the United States Code, you cannot find a statutory requirement for both parents of a President to be US citizens nor is there a requirement that his birth occur on US soil. Unless you can prove Obama, Sr. divorced his first wife (still alive when the President was born) before his marriage to the President’s mother, then even if the President was born overseas, he takes citizenship through his mother, period.
While you’re digging through Kenyan family law records, try to dig up a Kenyan birth certificate for the President while you’re at it. Hawaii is up 1-0 with its certificate of live birth. Right now, that’s the best evidence of the location of the President’s birth.