You have to read what the law stated at the time of Obama's birth. Stanley Ann Dunham was 18 years of age at the moment of Barack's birth. She would have needed to have been at least 19 years of age to confer US citizenship upon him.
Read it for yourself:
"There three ways for a person claim citizenship, what most of us think of first is called Jus soli, “the right of the soil,” which is the physical location your place of birth. The second is what is called Jus sanguinis, “the right of blood,” which you inherit from your parents. The third is a combination of Jus soli and Jus sanguinis, and it is this combination that determines if one is a natural born citizen.
Since any citizenship under Jus solis is codified by the Fourteenth Amendment, we only find laws for passing citizenship via Jus sanguinis on August 4th, 1961 in the Immigration and Nationality Act of 1952 (McCarran-Walter Act). This act states that in order for Obama’s right of blood citizenship to be passed to him, that since he only had one parent who was a U.S. citizen at the time of your birth, that parent must have resided in the United States for at least ten years, at least five of which had to be after the age of 14. Barack Hussein Obama, II fails the test for the right to claim “natural born citizen” status."
“Stanley Ann Dunham was 18 years of age at the moment of Barack’s birth. She would have needed to have been at least 19 years of age to confer US citizenship upon him.”
Wow.
Now that is the clearest statement I have seen so far.
And the rest of your post puts it on solid legal ground.
Good job.
So, are you saying that any US-born girl who gets pregnant at age 18 from a man who is not a US citizen does not confer citizenship to the offspring?
That would render many tens of thousands of American ineligible for higher office.