An aluminum shortage is forcing a Michigan factory that produces certain Jeep vehicles, including its flagship luxury SUV, to temporarily halt production for several weeks.  A United Auto Workers (UAW) source told FOX Business that a shift at the Warren Truck Assembly plant in Michigan is on temporary layoff due to an aluminum supply chain issue. The halt in production is impacting the production of Jeep's Wagoneer and Grand Wagoneer, the source said. The UAW is a labor union representing the Big Three auto ...