§ 1401. Nationals and citizens of United States at birth
The following shall be nationals and citizens of the United States at birth:
(a) a person born in the United States, and subject to the jurisdiction thereof
Might suffice for a Senator or Congressman, the POTUS is required to be a Natural Born Citizen.
Barack Obama’s father was not a U.S. citizen is a fact. At the time of Barack’s birth, his father was a British subject in the British colony of Kenya and that British citizenship was Obama’s until at least the age of 21. At the age of 21, Obama likely held both Indonesian (as he had been legally adopted by his Indonesian step-father Lolo Soetoro) and British citizenship. Twice in Indonesian primary school records (1967-71) Barack is listed as an Indonesian citizen.
Obama’s mother was only 18 when Obama was born. This means even though she had been a U.S. Citizen for 10 years, his mother fails the test for at-least-5-years-prior-to Barack Obama’s birth, but-after-age-14. In essence, his Mother as the sole U.S. parent is not old enough to qualify her son for automatic U.S. Citizenship.
At most, 2 years elapsed from his mother turning 16 to the time of Barack Obama’s birth when she was 18. His mother would have needed to have been 14 + 5 = 19 years old at the time of Barack Obama’s birth for him to be a natural-born citizen. Obama had to be naturalized to become a U.S. citizen and that disqualifies him from holding the office of POTUS or Vice POTUS. The Constitution clearly declares: Naturalized citizens are ineligible to hold the office of President or Vice President. Barack Hussein Obama II is now an American citizen by his marriage to Michelle Robinson.
Precedent-setting subsequent Rulings):
The following shall be nationals and citizens of the United States at birth:
(a) a person born in the United States, and subject to the jurisdiction thereof
That's wonderful, except you're confusing "Citizen" with "Natural Born Citizen", which is a common error.
According to your "theory", Anchor Babies are eligible for the U.S. Presidency, as Title 8, Chapter 12, Subchapter III, Part 1, § 1401, (a) is the clause that was wrongly interpreted to allow Anchor Babies, which is a whole nother story.....