If this is true, how did Bellei lose his citizenship?
He lost it because he didn't fulfill a residency requirement for someone in his category (since abolished, as I understand it). This is one of the cases around the edges I mentioned before, because I've seen cases like his called "automatic naturalization." But if he had fulfilled the residency requirement and retained his citizenship-from-birth, I don't think anyone would have challenged his eligibility for the presidency.