Richard Mack is the former sheriff of Graham County, Arizona and a political activist. He is known for his role in a successful lawsuit brought against the federal government of the United States which alleged that portions of the Brady Handgun Violence Prevention Act violated the United States Constitution. He is a former lobbyist for Gun Owners of America (GOA) and a two-time candidate for United States Congress. Mack is also the founder of (CSPOA), and established the "County Sheriff Project" movement, both of whom reaffirm what they claim is the constitutional power to refuse to enforce federal laws.