A deal designed to force compliance with tougher emissions standards is as risk after the Trump administration intervened.
More than 7,000 U.A.W. workers at Daimler Truck plants in North Carolina are set to strike at midnight in a labor action that could carry political consequences.
Daimler, Navistar and Volvo have been criticized for not selling many electric heavy trucks, but the companies say the country first needs many more chargers.
Under pressure to cut emissions, truck manufacturers are choosing between batteries and hydrogen fuel cells. Wagering incorrectly could cost them billions of dollars.