Obama, from the founding fathers own words, is not qualified. That is now established fact.
“NBC is a constitutional provision, as written and never amended”
The phrase was never amended, but it doesn’t have to be for its application to change, which ought to be a lot more obvious to everyone involved in this debate. Natural born citizen means citizen from birth, which at the time of the Constitution’s adoption may very well have been restricted to children born of two citizen parents. Fine, but after the 14th amendment it’s absolutely irrelevant, because now “jus soli” rules and children born in U.S. territory are citizens from birth.
Let’s assume the Framer’s intended to restrict the presidency to people with two citizen parents. The mechanism by which they sought to secure it was to allow eligibility only to born citizens. Over time, the category of born citizens expanded, and hence the import of the clause changed without being directly amended. Easy-peasy, Japanesey.