That’s still a question, but they sure loses their right to be a NBC, including being a dual citizen from the father’s sperm!!!
And they do this how, specifically, given that the constitution does not define the term in the first place? Traditionally, if you were born in this country, with very limited exceptions, you were a natural born citizen, as most Americans understand it. I don’t think that another country’s policies can particularly interfere with that. Claims that since Obama had dual citizenship at birth don’t hold much water because we’ve had other presidents in the same situation from what I understand, specifically Chester A. Arthur.