As I understand it, the only issue is was he born to parents who are current US citizens? McCain had a similar problem being born in Panama, but both of his parents were US Citizens at the time so the issue was moot.
There’s a whole lot of naturalized versus natural born if anyone wants to muddle through it all. That’s why 0bama, technically, should have not cleared vetting. The left changed it to only needing the mother to be a citizen. Without the media/press or the GOP candidate making an issue of it nothing resulted.
I think Obama's eligibility was found to based on being born in Hawaii, citizenship of parents isn't a relevant factor when a person is born on US soil.