With all due respect, your grandfather understood the misapplied (US v Wong Kim Ark 1898)birthright issue not the presidential requirements. Obummer’s mom was an American born in Wichita, KS; that makes him the child of an American. Children born to US service members overseas are natural born American citizens, are they not? The debate here is what does NBC mean? You would have me believe that any anchor baby born in the US is now eligible to be president is preposterous. This turns the Article II requirement on its head. Under your interpretation, a NBC is anyone born on American soil or anyone born to an American, but that would eliminate the need for the word “natural”. All citizens would be eligible. The framers understood at that time to separate the two ideas of NBC and a citizen that swore allegiance to the new US of A. Otherwise Washington could never have been president because he was the natural born citizen of the British Empire.
Obama might have been a Natural Born American Citizen wherever he was born since his mother was a citizen.
HOWEVER this does not to apply to a child born abroad to an underage mother, as was Dunham.
IF Obama was born abroad to an underage US citizen mother without a US citizen father, he is NOT a Natural Born Citizen of America.