at birth through me, in order for Cruz to acquire his U.S. born mother's citizenship - assuming that he came under the pre-1986 Immigration laws, as did my son - his mother would have had to have been unwed at the time of his birth (as I was) and would have had to live in the United States 14 years consecutively since her birth (as I had). If that's not the case, and if other laws of that time for children acquiring U.S. Citizenship who are born abroad are not applicable, he couldn't have qualified to become U.S. Citizen at birth but he could have become a permanent resident alien.

But according to the linked piece, Rafael Cruz Jr. was born in wedlock, so he didn't acquire U.S. Citizenship via his American-born mother. I'm not an immigration attorney so I'm not going to say he's not an American citizen, but I speak out of personal experience when I discovered that my eldest son was a child born abroad of an unwed U.S. mother who now holds dual-citizenship: Dutch and U.S.

That's good enough for me.