Cruz was made a citizen by statute.
I asked "when?" was he naturalized.
He is a citizen by birth but he is not natural born.
Cruz was naturalized at birth if his mother met the criteria under Sec. 301 (a) of the Immigration and Nationality Act of 1952.
He was naturalized in 1934 when Congress passed the law making the foreign born children of American Women into citizens where before they were not.