No (and I am assuming you are talking about the US) the supreme law of the land would be the FEDERAL constitution - that law that the US supreme court upholds. This is explained in Article VI, the...
Acticle VI, Section 2, which is known as the Supremacy Clause. Article VI All debts contracted and engagements entered into, before the adoption of this Constitution, shall be as valid against the...
Article VI, Clause 2 (the Supremacy Clause) states the US Constitution and federal laws and treaties made in accordance with the Constitution are the supreme law of the land.