Only one parent is required being a citizen.
I agree that she can pass citizenship..but NBC is the requirement...
Come on now, quit playing the Village Idiot.
Read the source and other posts here, there are only two types of citizenship, NBC and Naturalized.
A parent and in particularly the mother who is a US citizen, passes NBC onto her or their children, regardless where the birth took place.
Naturalization requires the PERSON to request such citizenship. Did Cruz request Naturalized citizenship? No! As he was already a Natural Born Citizen.