The Trump administration is planning to implement a 25% truck tariff on October 1 to safeguard U.S. truck manufacturing, despite most production occurring domestically. Key considerations include the tariff’s effect on the vehicle parts supply chain, potential stacking on existing tariffs, and its compatibility with the USMCA. Truck manufacturers, who already produce 99% of Class 8 trucks domestically, express concern about increased costs from existing tariffs. The tariff aims to shield manufacturers from foreign competition and enhance financial stability for truckers, though it may drive up prices further.