 Article Two of the Constitution sets one of the principal qualifications to be eligible for election of the office of President as being a natural born citizen of the United States.Although McCain was not born within a state of the United States, his status as a natural-born citizen (and future eligibility to be elected to the presidency) may have been assured at birth by either "jus sanguinis", since his parents were U.S. citizens, or "jus soli", as the Panama Canal Zone was at that time (1936) a United States possession (1903–1979), or both.However, Internet talk questioned whether McCain, who was born at Coco Solo Naval Air Station in Panama, qualified as a natural-born citizen.