Tesla CEO Elon Musk attends the Tesla Shanghai Gigafactory groundbreaking ceremony in Shanghai, China, January 7, 2019. Aly Song | Reuters Tesla is among the hundreds of auto industry players asking the U.S. Trade Representative for extended tariff waivers on parts and materials imported from China used to make or repair cars. Supply chain issues are contributing to soaring prices for new and used vehicles in the U.S. Tariffs levied during the Trump administration’s trade war with China are contributing to those price increases — especially since temporary exclusions to some of those tariffs were allowed to expire in late...