...and if barry’s daddy wsa a british subject, then the question is if baby barry was subject to the british crown
Some here have said that the US determines citizenship for its inhabitants irrespective of the citizenship determinations of other countries. In other words, if you qualify under US law as being a US citizen, it doesn't affect your legal citizenship in this country if some other government grants you citizenship as well.
It's tough, I know. We're all getting an education here, including me.