That's what is unique about America. The Constitution supersedes all laws either federal or state. Whenever a conflict arises between what's written in The Constitution and a federal or state statute the former takes precedence. Moreover, changing The Constitution is notoriously difficult.
The authority to amend the Constitution of the United States is derived from Article V of the Constitution. After Congress proposes an amendment, the Archivist of the United States, who heads the National Archives and Records Administration (NARA), is charged with responsibility for...
www.archives.gov
"The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures. "
Given the current political climate in the US I would argue you have a better chance of winning the power ball lottery than getting two thirds of the House and Senate to agree on a Constitutional amendment. I mean you can't even get them to agree on how to disagree!