Yes, and it also says:
This Constitution, and the Laws of the United States which shall be made in Pursuance therefore; 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.
That last clause leaves me a bit uncertain.
I am pretty sure that “...the Judges in every State...” does not include the United States Supreme Court.