"A law repugnant to the Constitution is void. An act of Congress repugnant to the Constitution cannot become a law. The Constitution supersedes all other laws and the individuals rights shall be liberally enforced in favor of him, the clearly intended and expressly designated beneficiary." Marbury vs. Madison, 5 U.S. 137 (SCOTUS 1803)
"An unconstitutional law is void and is as no law. An offense created by it is not crime. A conviction under it is not merely erroneous but is illegal and void and cannot be used as a legal cause of imprisonment." Ex parte Siebold, 100 U.S. 371 (SCOTUS 1879)
"An unconstitutional act is not law. It confers no rights; it imposes no duties; affords no protection; it creates no office. It is, in legal contemplation, as inoperative as though it had never been passed. Norton vs. Shelby County, 118 U.S. 425 (SCOTUS 1886)