user: Question: What is the most Champ Car wins for any driver with a USAC record of 2?
Columns: ['Driver', 'AAA (1902–1955)', 'USAC (1956–1995)', 'CART (1979–2003)', 'Champ Car World Series (2004–2007)', 'IZOD IndyCar Series (1996–present)', 'Combined Total']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['A. J. Foyt Category:Articles with hCards', 0.0, 67.0, 0.0, 0.0, 0.0, 67.0]
SQL:

assistant: SELECT MAX("Champ Car World Series (2004–2007)") FROM "Table" WHERE "USAC (1956–1995)" = 2.0;