He was not naturalized but, a citizen at birth.
A citizen at birth via an Act of Congress and Congress can only enact laws governing naturalization.
Something for you to consider...
Acquisition of Citizenship
U.S. citizenship may be acquired either at birth or through naturalization subsequent to birth.
Do you understand acquisition in a legal sense? Natural born citizens inherit their citizenship, they don't acquire it.
The law I quoted in post 197 defines who is a citizen at birth and I linked to it.
http://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title8-section1401&num=0&edition=prelim
It does not state who is eligible to become naturalized.
There are only two ways to become a citizen. Two. Just, two.
You are born one (natural) or you become one (naturalized).
That’s it. Two possibilities. It’s that simple.