"During the New Deal Era, President Roosevelt struck a bargain with Southern Democrats: they would support worker rights legislation so long as their farmworkers (and other predominantly African-American workers, such as domestic workers) were exempt. Thus, Congress excluded farmworkers from the National Labor Relations Act of 1935 (NLRA), the main federal law that protects workers who join and organize labor unions, and from the federal minimum wage and overtime protections in the Fair Labor Standards Act of 1938"

https://thenaturalfarmer.org/article/brief-history-farmworke...