The clear language of the Constitution refutes your claim ... "No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President"
This means that there is a difference between "natural born citizen" and "citizen of the United States." Naturalized citizens have never been eligible for the Presidency, so that does not enter into any discussion of the meaning of the language.
U.S. citizen at birth means a “natural born citizen” i.e. not a “naturalized” citizen.
I never claimed there was no distinction between a “natural born citizen” and a “U.S. citizen”, please engage what I actually said rather than what you thought I said.
My Governor is a U.S. citizen, but he is a naturalized immigrant and not a natural born citizen. In other words (for those of you in Rio Linda) he was not a U.S. citizen AT BIRTH.