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The Constitution does not define the meaning of “natural born Citizen.” The U.S. Supreme Court gives meaning to terms that are not expressly defined in the Constitution by looking to the context in which those terms are used; to statutes enacted by the First Congress, Marsh v. Chambers, 463 U.S. 783, 790-91 (1983); and to the common law at the time of the Founding. United Suites v. Wong Kim Ark, 169 U.S. 649, 655 (1898). These sources all confirm that the phrase “natural born” includes both birth abroad to parents who were citizens, and birth within a nation’s territory and allegiance. Thus, regardless of the sovereign status of the Panama Canal Zone at the time of Senator McCain’s birth, he is a “natural born” citizen because he was born to parents who were U.S. citizens.

This is what it says using the opinion of Lawrence Tribe and Ted Olson.