Acquisition of U.S. citizenship by birth abroad to a U.S. citizen parent is governed by Federal statutes. Only insofar as Congress has provided in such stat utes, does the United States follow the traditionally Roman law principle of "jus sanguinis" under which citizenship is acquired by descent (see 7 FAM 11
It does not say that both parents have to be US Citizen
That’s correct. I don’t think I implied otherwise. At least, I hope not.