The US Senate amended the treaty statute in 1948
Article II, Section 2 of the Constitution gives the President the power “to make Treaties, provided two thirds of the Senators present concur.”
The United Nations Charter, delivered to the US Senate by President Harry Truman and duly ratified by that body on July 28, 1945 by a vote of 89-2.
U.S. Const. art. VI, cl. 2.
This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.