UAW, Mercedes-Benz, and unions’ fight for the South Vox.comUAW’s influence tested in pivotal Alabama Mercedes-Benz factory union vote ReutersUAW faces test of its plan to unionize auto plants in anti-union South as vote wraps up at 2 Mercedes-Benz factories in Alabama FortuneMercedes-Benz workers cast final votes in high-stakes UAW election CBS News