Title: List of Big Ten Conference football champions
Content:  ^ Ohio State vacated all wins from the 2010 season and their share of the championship
Title: List of Big Ten Conference football champions
Content: Keys ; Italics indicate a school no longer competing in the Big Ten. ; Bold indicates an outright conference championship. Notes  
Title: List of Big Ten Conference national championships
Content:  The Division I (FBS) football championship is not officially sanctioned by the NCAA; however, the Big Ten teams among the champions and co-champions listed in its official NCAA Football Bowl Subdivision Records book are shown below. Prior to joining the Big Ten, Nebraska won 3 football national titles and 2 co-titles, Penn State won 2 national titles, Maryland won one national title, and Michigan State won one championship (1952, the year before it began Big Ten competition). The NCAA was formed in 1906 to address violent injuries in the sport. † As listed in official NCAA Football Bowl Subdivision Records. For 1950 to present, includes only recognized consensus selections (AP, UP-UPI-USAT, FWAA, NFF)
Title: List of Big Ten Conference national championships
Content: Michigan State joined in 1950 and competed in the conference for the first time in 1953. ; Penn State joined in 1990 and competed in the conference for the first time in 1991. ; Nebraska joined in 2011. ; Rutgers and Maryland joined in 2014. Johns Hopkins joined in 2014 for men's lacrosse and began play in spring 2015. The list of Big Ten national championships includes championships won by teams from the Big Ten Conference and former member Chicago. Including football champions listed in the official NCAA Records book, Big Ten teams have compiled 297 NCAA and Football Bowl Subdivision national championships (as of December 18, 2021) during their years of membership. Prior to NCAA sponsorship of women's sports, Big Ten teams, as members of the AIAW, also won 
Title: List of Big Ten Conference national championships
Content:  † includes football national championships by Big Ten members starting in 1901, as listed in the official NCAA Football Bowl Subdivision Records book
Title: Big Ten Conference
Content:  Big Ten field hockey programs have won 11 NCAA Championships, although only three of these titles were won by schools as Big Ten members. Maryland won eight national championships as a member of the ACC, second most in the sport all-time. Penn State's two AIAW championships were also won before it became a Big Ten member and before the NCAA sponsored women's sports.
Title: Big Ten Conference
Content:  The Big Ten men's soccer league includes Indiana, Maryland, Michigan, Michigan State, Northwestern, Ohio State, Penn State, Rutgers, and Wisconsin. Big Ten men's soccer programs have combined to win 15 NCAA national championships.
Title: List of Big Ten Conference baseball champions
Content:  Italics indicates a team no longer competing in baseball in the Big Ten. Bold indicates an outright Big Ten championship.
Title: List of Big Ten Conference national championships
Content:  most recent NCAA championship won by a member of the conference
Title: List of Big Ten Conference football champions
Content:  This is a list of yearly Big Ten Conference football champions. Co-champions are listed in alphabetical order.

Question: who has the most big ten championships in football?
Answer: Michigan.