Well, I don’t think there is any doubt if both parents were US Citizens regardless of where he was born. In MY interpretation of the NBC clause and the founding father’s intent, he would need to be born under the authority of no other country (not just denounce it) and subject to LAWS of another nation. The surefire way for that to happen is to be born of 2 US citizens.
Now whether that legally is the issue, I don’t know because from I’ve (not) found, it’s never really been tested. And frankly it is an issue that should have been dealt with back in 2007/2008. But people were just rabidly pro-Obama and common sense went right out the window.
That’s my understanding also. It seems to boil down to how serious is the country about its Constitution.