The electric carmaker’s warning about tariffs comes despite its boss's key position in the Trump administration.

While Elon Musk has emerged as one of President Donald Trump's most loyal supporters—backing his policies and contributing over $300 million to his reelection campaign—the tech mogul's companies are now fearful of the unintended consequences of the administration's aggressive trade measures.

President Donald Trump’s tariff policy isn’t popular with the auto industry. That goes for Tesla, too. Tesla sent an unsigned letter to the U.S. Trade Representative warning of the impact of retaliatory tariffs on the electric vehicle maker,