Based on what law?
>> ... so I don’t think he does qualify with the NBC-clause.
>
> Based on what law?
Given the Constitution IS the highest law, itself.
The strictest definition I’ve seen is “Born to two US Citizens in the US” — I’m not sure that the “in the US” is a good qualifier, as that would exclude, say, children of Ambassadors if their kids are born in that foreign country, and the Constitution’s residency requirement could be taken in support of that being an excessive/extraneous requirement, but [as stated] that’s the strictest definition I’ve seen. (The two US citizen parentage is, IMO, perfectly reasonable and seems in-line with the concerns of the Presidency falling to someone with foreign allegiances.)
Info Link: http://www.constitution.org/abus/pres_elig.htm