Jimmy Hoffa IBT would expand as the union itself grew. Hoffa worked to defend the Teamsters unions from raids by other unions, including the CIO, and extended the Teamsters' influence in the Midwestern states, from the late 1930s to the late 1940s. Although he never actually worked as a truck driver, he became president of Local 299 in December 1946. He then rose to lead the combined group of Detroit-area locals shortly afterwards, and advanced to become head of the Michigan Teamsters groups sometime later. During this time, Hoffa obtained a deferment from military service in World War II by successfully making
Jimmy Hoffa bid in 1972; in prior elections, the union had supported Democratic nominees but had also endorsed Nixon in 1960. Suspicion was soon raised of a deal for Hoffa's release connected with the IBT's support of Nixon. It was alleged that a large sum of money, estimated to be as high as $1 million, was paid secretly to Nixon. Evidence was also alleged of a secret bribe paid in 1960. While glad to regain his freedom, Hoffa was very disappointed with the condition imposed on his release by President Nixon, which prevented Hoffa from engaging in union activities until March 1980.