My question was solely on the operation of US law. I agree with you that foreign laws don't have play. Imagine the nonsense scenario where Congress enacted legislation that extended US Citizenship to anyone born in North Korea. That would make every North Korean eligible under the NBC aspect of the US Constitution, following the premise that Congress can define NBC by statute.
-- Ted Cruz did not need to revoke his Canadian dual dual citizenship either. --
I've said the same as devil's advocate. Then, assuming he won the election, we would have a Canadian citizen for president, eh!
Yes, according to the Canadians.
And if Trump were elected, we'd have Brit, according to them.
There is no issue here.