So what if Britain decides that ALL U.S. citizens, the USA being a former colonial possession, are now British citizens at birth?
Nobody born after the date of that British law would be a natural born citizen of the United States?
Every American citizen would be claimed by both nations at the instant of their birth.
So is who is going to be a natural born citizen of these United States determined by
a) American Law
Or
b) British Law
????
That is a little backwords. The child is not claimed by any Nation rather the child by Birhright has claim to the Nation of his or her parents Citizenship.
Just like children born here of illegals from Mexico still have claim to their Mexican Citizenship.
What a government decides with regard to the issue you bring up is NOT relevant. Israel has already done the very thing you mention.
THe ONLY issue at hand is this. What is the baby's Mother's citizenship and what is the Baby's Father's citizenship at the instant of the child's birth? Where was the child born? In the soil of his parent's nation? If the answer to these questions is singularly and solely that of United States Of America, then that child is a Natural Born Citizen of the United States.
What any other government decides retroactively or at any other time is utterly irrelevant. You could give us all citizenship on MARS, but it would not be relevant until you deliberately SOUGHT OUT that citizenship as an Adult. That is voluntary relinquishment of citizenship, and from that instant on forward, you would lose your Natural born Citizenship. It cannot ever be regained once lost, it cannot be retroactive. The only instant that matters is birth, and the instant you relinquish your citizenship to take up one of another Nation.
Are we on the same page yet?