and your point is! In 1963 Obama got his citizenship for life as defined by the Kenya Constitution, prior to that he was a subject of the crown.<quoted text>
That is right. There is no such thing as dual citizenship. The fact that a foreign country considers that someone is also a citizen of that country does not affect US law IN THE SLIGHTEST. Our law is not affected by their law. Dual citizenship does not affect US citizenship, and it does not affect Natural Born Citizen status either.
And, guess what, Obama is not a dual citizen. He WAS a dual citizen, but that lapsed long ago. Kenya law does not allow dual citizens, so since Obama was a citizen of the USA he automatically lost Kenyan citizenship when he became 21. In contrast, Jefferson and Madison were dual citizens WHEN THEY WERE PRESIDENT.
ALSO, you are not allowed to make up theories in strict construction interpretation. If the US Constitution does not say "dual citizens are barred" and if the meaning of Natural Born does not exclude dual citizens, and the US Constitution does not bar dual citizens and Natural Born status includes them, so dual citizens are not barred. And, as noted, Obama is not a dual citizen; he is a FORMER dual citizen.
Sorry, to be a citizen of another foreign power, prevents you from being born a citizen of the US.
Guess what, your citizenship is at the moment of birth.