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TEAMSTERS LOCAL 743 Bring the DNC to Chicago Hometown of the American Labor Movement A post shared by Chicago Federation of Labor chicagolabor Search For over 70 years Local 743 has played a pivotal role in the IBT organization. Once called the progressive union Local 743 has been at the forefront of the battle for workers39 rights and civil rights in Chicago and Illinois. Local 743 is home to 10000 hardworking men and women serving health care mail order technical and warehouse employees. Local 743 believes that workers are the union.