The left went after McCain on the NBC thing. Totally ridiculous since McCain parents were both US citizens and on deployment by the US Navy. So if the Rats went after McCain, it is a certainty the Rats will, with great effect, go after Cruz on the NBC thing.
Five Democrat Senators: McCaskill, Obama, Clinton, Leahy and Webb and one Republican, Coburn sponsored/co-sponsored Senate Resolution 511 acknowledging that McCain was a natural born citizen.
https://www.congress.gov/bill/110th-congress/senate-resolution/511