Tesla (TSLA.O) has warned that President Donald Trump's trade war could make it a target for retaliatory tariffs against the US and increase the cost of making cars in the country, the Financial Times reports. In an unsigned letter to U.S. Trade Representative Jamison Greer, Tesla said it ‘supports’ fair trade but warned that ‘U.S. exporters will be disproportionately impacted when other countries respond to U.S. trade actions ‘. ‘For example, past U.S. trade actions have resulted in immediate responses from targeted countries, including increased tariffs on electric vehicles imported into those countries,’ the company wrote in its 11 March letter. The letter highlights that even Tesla, which is led by Musk, a close Trump ally, is concerned about the potential impact of broad tariffs.