Tell me if this
is what would be the most central, uh, controlling legal authority that would be quite difficult, if not impossible to surmount, thus leaving Cruz well beyond any serious legal challenge as for his qualification to run for presidential office.
A serious inquiry does not end with the correct statutory language. One looks to how the courts view the acquisition of citizenship by statute.
As you well know, and choose to ignore, the controlling court cases find all persons born abroad to be presumed alien at birth. If the circumstances of birth, of a person born abroad, comport with language in an Act of Congress, that person is considered a naturalized citizen.
Under controlling legal precedent, Ted Cruz is a naturalized citizen of the United States.