At the moment, I'm wondering if and how Obama's dual citizenship at birth - as a result of his father's domicile - ended. Surely he is not still a citizen of the U.K. or else he would be paying taxes to them (visions of Al Capone's oversight.)
I'm not sure it ever did, dearest sister in Christ. And it really wouldn't matter whether it did or not, as far as the "natural-born" criterion is involved. This is the problem: His father was not an American citizen. Neither was his stepfather.
His mother Stanley Ann was. But whether she had the ability to transfer American citizenship to her son at the time of his birth (because she was not of legal age to do so under the relevant naturalization statutes of the time) is the crux of the issue.
But even if Obama's claim to citizenship stems from his mother, still he would not be a "natural-born citizen of the United States" because of the citizenship status of his father(s).
At least, this would be how I'd define the problem before us.
Maybe the Treasury of the United Kingdom should take a look at back taxes owed by our sitting POTUS? Or maybe the Indonesian fiscal authorities?