Under no circumstances would our Constitution allow the US to subordinate our Sovereignty to an extra-Legislative hegemony of member nations.
I hope you are right. I never would have imagined a justice on the SCOTUS would ever refer to European legislation as precedence but that has also happened.
Our Constitution may not, but there are plenty of mind-numbed politicos who, enamoured of world opinion, would allow the UN to do exactly that. This upcoming UN conference on small arms is just one good example.
Sad that it's taken this long for even a small number of Europeans to understand what is happening in the global governance movement, and that given time, it will destroy their way of life as surely as Hitler tried to do not so many years ago.