Also, the defeat in February of the UAW's effort to unionize workers at Volkswagen's Chattanooga, Tennessee, plant was a setback to labor.A 2013 Gallup poll showed that 54 percent of Americans said they approved of labor unions, down from the all-time high of 75 percent in both 1953 and 1957.Labor unions play a diminishing role in the private sector, but they still claim a large share of the publ