The allegiance of the sovereign? That is laughable. You think people have a natural allegiance to a hereditary sovereign - or is it the natural right of people to be free?
An unborn child is not an alien or foreigner and when they are born a U.S. citizen they are not “naturalized”.
U.S. law consistently uses the language “born or naturalized as a citizen”. One or the other. One is either born a citizen or naturalized as a citizen.
If you are going to act willfully stupid, as if you had never heard of the pledge of allegiance to the United States of America “and the freedom for which she stands”, then you’re not worth anyone’s waste of time.
“when they are born a U.S. citizen they are not ‘naturalized’.”
They are made a citizen, just as a naturalized citizen is made a citizen. Since they are made citizens, they could not have been citizens before they were made citizens. Otherwise there would have been no reason to have a law, commnlaw or statutory law, to make the person a citizen at birth or subsequent to birth in the event they had been a citizen at birth without such a law.
A true natural born citizen is a citizen without the action of a jus soli or jus sanguinis law to make them a citizen at birth or subsequent to birth.
A person who is made a citizen at birth by act of a law as if they are naturalized at birth is by the action of law an unnatural citizen at birth and not a natural citizen at birth.!