The Foreign Affairs manual states:
7 FAM 1131.6-2 Eligibility for PresidencyIn short, the courts have not yet ruled on whether or not a statutory natural-born citizen is eligible to the presidency.
(TL:CON-68; 04-01-1998)a. It has never been determined definitively by a court whether a person who acquired U.S. citizenship by birth abroad to U.S. citizens is a natural born citizen within the meaning of Article II of the Constitution and, therefore, eligible for the Presidency.
(...)
d. (snip) In any event, the fact that someone is a natural born citizen pursuant to a statute does not necessarily imply that he or she is such a citizen for Constitutional purposes.
I believe they would rule in favor of Cruz's eligibility, but as of right now, the State Department says that there isn't a definitive answer. So everyone on this thread who is claiming he's eligible or he's ineligible is full of horsesh*t. Nobody knows - not even the State Department. Unless and until the courts rule, it's all speculation.
And that is my wider point, we can argue all night, but nothing prevents Cruz from running at this point and in putting this to the fore front he only forces the question of Obamas eligibility.
Cruz has nothing to lose.
Gotta hit the bricks.
Zzzzzzz....