We’re headed that way if the American people don’t man up and tell the UN to get the hell out of our country. The U.S. Constitution does not say anything about having a UN to help govern the country.
No, but... the US Constitution did have a means to effectively amend it, putting it on a par with treaties and then offering a flimsy way of ratifying them that includes by voice vote of a bare quorum. IOW, the Constitution makes it possible for 34 Senators to dictate the Supreme Law of the Land. That codex of international law has infested federal statutes to a massive degree ever since the creation of the UN, by treaty as enforced in Federal courts.