I've been dealing with the above assertion repeatedly, already.
The arguments that have been made in attempts to support the assertion have lots of holes in them.
I've exposed many of those, showing why the assertion can't get past the controlling statutory language that recognizes persons born under the conditions which Cruz was, were at birth -- citizen of the United States.
It'd be an uphill battle from there for anyone to establish Cruz is not qualified under the laws as those were at time of his own birth.
Citizenship acquired from birth from one's parents, and under that concept according to statutes, extended also to citizenship acquired from a single parent, father, or mother, it making very little difference which one of those now --- it can be argued --- fulfills the criteria to be considered "natural born citizen" as long as the residency requirement conditions as stipulated under the code (8 U S C 1801) have been met.
You do not get to make up the rules and definitions of Articles and Sections in our US Constitution.