 As a senator, McCain often supported the Native American agenda, advocating self-governance and sovereignty and tribe control of adoptions.Along with Senator Daniel Inouye and Representative Mo Udall, McCain was one of the main writers of the 1988 Indian Gaming Regulatory Act, which codified rules regarding Native American gambling enterprises and established the balance between Indian tribal sovereignty and regulatory oversight by the states of such activity.The Act enabled the growth of what would become, two decades later, the $23 billion Indian gaming industry.