The United States Auto Club (USAC) is a sanctioning body for motorsports in the United States, established in 1956. It oversees various racing series, including open-wheel, midget, and sprint car racing. USAC is known for promoting safety and fair competition in motorsports, providing rules and regulations for events. USAC also organizes events across the country, featuring both professional and amateur racers. The organization has a rich history and has been instrumental in the development of American motorsports, contributing to the careers of many notable drivers, including Tony Stewart and A.J. Foyt.