Consanguineous Marriage Prohibition Act of 2026

This bill proposes to amend federal law to prohibit marriages between individuals who are first cousins or closer relatives. It directly affects couples seeking to marry within the United States government's jurisdiction by adding them to the list of prohibited relationships. The key mechanism is a specific change to the U.S. Code that removes the legal exception allowing first cousins to marry. This legislation would make such unions federally invalid, though it does not alter state laws regarding marriage.