When I mentioned Jindal’s name, it was not in relation to his possible run for the Presidency, it was in relation to his being a citizen by birth.
My point was if he did not acquire citizenship at the time of his birth, and he never applied for naturalization, then I don’t know how he qualifies to even be Congressman ( which he was ) or governor ( which he is ).
Being a Natural Born Citizen is another matter altogether.
Jindal was born in the U.S. to parents who had green cards at the time via his father's profession. He was born a citizen. That doesn't necessarily make him a natural born citizen for the purpose of Constitutional Presidential eligibility.