"Is an Opinion of the Supreme Court the ‘Law of the Land’? Let’s ask Thomas Jefferson. . ."
That decisions of the Supreme Court are the supreme law of the land is settled, accepted, and beyond dispute, as originally intended by the Framers, the Founding Generation, and the American people who read, understood, and ratified the Constitution:
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.
US Constitution, Article VI