Born in a foreign country. [1]
Born with foreign citizenship. [2]
Born owing allegiance to that foreign country. [3][4]
Born a U.S. citizen due exclusively to his mother meeting the specific requirements in the congressional law in existence at the time of his birth. [5]
Foreign born Sen. Ted Cruz is a U.S. citizen by congressional statute.
Congress does not have the Constitutional authority to make laws determining who may be a "natural born Citizen.
Instead of seeking the office, Sen. Ted Cruz may be trying to force the issue into the "national" debate.
You can rail against Cruz all you want, but very few conservatives here or anywhere will follow.