No, Cruz was a citizen at birth because his mother was a citizen. No court had to grant him citizenship.
Oy vey!
Volume 12 Citizenship & Naturalization
Part H Children of U.S. Citizens
Chapter 3 United States Citizens at Birth (INA 301 and 309)
In general, a person born outside of the United States may acquire citizenship at birth if:
The person has at least one parent who is a U.S. citizen; and
The U.S. citizen parent meets certain residence or physical presence requirements in the United States or an outlying possession prior to the persons birth in accordance with the pertinent provision. [2]
No court had to grant him citizenship.
A law granted him citizenship.