The whole issue of what “natural born” even means is questionable.
McCain is because he was born in territory held by the U.S.
Anybody born to an American citizen anywhere is a citizen of the United States. It is just a question of whether they are natural born. They may not be in some cases, such as Obama if he were born in Kenya. McCain clearly was since he was technically born on U.S. soil. However, if Obama was born in Kenya, he clearly was NOT. Is he natural born?
The courts would have to decide that one. I would be they would rule in his favor even though I personally would think that would make him not natural born.
He is not natural born if born in Kenya because at that time his mother was not 21 so she could not have given him American citizenship to make him natural born. You had to live in the States for 10 years and five of those years after the age of 16 and she was 18. She could have enrolled him when she got back but he still would not be eligible as a natural born citizen. If she had been 21, he would have been considered born to an American citizen abroad who qualified.
I didn’t even know until doing the research that ten years ago, the United States started recognizing dual citizenship. Two countries that don’t — Kenya and Indonesia.