Most CART championship titles won

Most CART championship titles won
Who
A. J. Foyt Jr.
What
7 total number
When
1979
Formerly the AAA (American Automobile Association 1909-55), USAC (US Auto Club, 1956-78), CART (Championship Auto Racing Teams, 1979-91), IndyCar, 1992-97, and currently the FedEx Series Championship, the most wins in the national championship is seven by A. J. Foyt (USA), 1960-61, 1963-64, 1967, 1975 and 1979.