In a letter addressed to the U.S. Trade Representative, Elon Musk's Tesla warned that retaliatory tariffs could affect production and harm U.S. companies.

Reuters, the news and media division of Thomson Reuters, is the world’s largest multimedia news provider, reaching billions of people worldwide every day. Reuters provides business, financial, national and international news to professionals via desktop terminals, the world's media organizations, industry events and directly to consumers.

As President Donald Trump raises tariffs, other nations are fighting back. They want to force negotiations, but it’s a high-stakes game of chicken for the global economy.