Table: champ_car_winners
Columns: driver
aaa_1902_1955
usac_1956_1995
cart_1979_2003
champ_car_world_series_2004_2007
izod_indycar_series_1996_present
combined_total

Question: What is the minimum number of wins possible for the Champ Car World Series among all the drivers?
SQL: SELECT MIN("champ_car_world_series_2004_2007") FROM champ_car_winners

Question: What is the most Champ Car wins for any driver with a USAC record of 2?
SQL: SELECT MAX("champ_car_world_series_2004_2007") FROM champ_car_winners WHERE "usac_1956_1995" = 2