Workers at Volkswagen’s plant in Chattanooga, Tennessee, voted Friday night against forming a factory-wide union, handing a setback to the United Auto Workers’ efforts to gain a foothold among foreign auto facilities in the South. The vote of hourly workers began Wednesday and concluded Friday. Preliminary results show 833 employees voted against representation and 776 voted for it, the German automaker said in a statement. VW said about 93% of the roughly 1,700 eligible employees voted. “Our employees have spoken,” Frank Fischer, president and CEO of Volkswagen Chattanooga, said in the company statement. He said results are pending certification by...