Your third definition.
Any one born outside the United States, if one parent is an alien and as long as the other parent is a citizen of the U.S. who lived in the U.S. for at least five years (with military and diplomatic service included in this time)
Looks like that works for Cruz. Thanks.
His mother was not in the military nor a diplomat.
That part of the law does not work for him. You’ll have to find another. I didn’t see one.