16 Am Jur 2d, Sec 177 late 2d, Sec 256:

The general misconception is that any statute passed by legislators bearing the appearance of law constitutes the law of the land. The U.S. Constitution is the supreme law of the land, and any statute, to be valid, must be In agreement. It is impossible for both the Constitution and a law violating it to be valid; one must prevail. This is succinctly stated as follows:

The General rule is that an unconstitutional statute, though having the form and name of law is in reality no law, but is wholly void, and ineffective for any purpose; since unconstitutionality dates from the time of it’s enactment and not merely from the date of the decision so branding it. An unconstitutional law, in legal contemplation, is as inoperative as if it had never been passed. Such a statute leaves the question that it…