Mandoli v. Acheson

This case presents but a single question, upon which petitioner and the Government are substantially agreed that the judgment of the Court of Appeals should be reversed.1 Does a United States citizen by birth who by foreign law derives from his parents citizenship of a foreign nation lose his United States citizenship by foreign residence long continued after attaining his majority?

Petitioner Mandoli was born in this country, of un-naturalized Italian parents. These circumstances made him a citizen of the United States by virtue of our Constitution and a national of Italy by virtue of Italian…