Last UpdatedSeptember 19, 2025 06:16 AMKey TakeawaysAutomakers and suppliers urged the Trump administration to halt unpredictable tariff expansions.They say sudden tariff changes raise costs, unsettle supply chains and deter U.S. investment.The Commerce Department may expand the list of tariffed auto parts after Oct. 1 comments.Companies are reassessing sourcing, but many components remain cheaper or only available overseas.DETROIT — Automakers and suppliers urged the Trump administration to en...