Under the requirement in the natuarlization act of 1790, the father still needs to be a citizen. This would still exclude Obama from being an NBC, of course.
But it is OBVIOUS to all but the deliberately obtuse that the 1790 law showed the supposed requirement of both citizen parents and born in country is a recent invention, not a well known and well understood universally accepted norm during the time of our founders, or subsequently - right up until shortly AFTER the 2008 election.