He also acquired United States citizenship at his birth under Rev.Stat. S: 1993, as amended by the Act of May 24, 1934, S: 1, 48 Stat. 797, then in effect.
Not to mention several subsequent remarks, and even the holding of the case, which depends in part on citizenship attaching solely via an Act of Congress.
I'm sure you know, but your foil is ignoring the completely different line of cases associated with expatriation of not-naturalized citizens.
Quite right.
The Bellei case had nothing to do with expatriation from the U.S., whether voluntary or not. Had Bellei completed his U.S. naturalization he would have expatriated from his native Italy.