[bvw]

Because at that time, only ONE parent decided it. The father. Only in the case where the father was unknown did the mother’s citizenship determine that of the child’s.

In the case of Obama — not a ‘natural born citizen’ of the US, because of his father being a British colonial.

[EnderWiggins]

"Because at that time, only ONE parent decided it. The father. Only in the case where the father was unknown did the mother’s citizenship determine that of the child’s."

Okay... I just went and looked yet again.

It doesn't say that either.