What to know as President Donald Trump imposes steep new tariffs on imports from Canada, Mexico and China, prompting retaliation and countermeasures.

Stocks in the US dropped Monday morning, following European and Asian markets lower as investors digested Trump's tariff announcements.

Trump's tariffs on Canada, Mexico and China suggest he is willing to risk a global trade war. The main thing that could stop him would be a stock market selloff.

Key Takeaways The fallout from President Donald Trump's trade war against America's largest trading partners is just beginning.Tariffs could cause rising prices, higher unemployment, and a general economic slowdown,

Firing the opening salvos of a trade war, Donald Trump said his reasons were simple: stop “illegal aliens” and put an end to the flow of fentanyl, a deadly opioid, on to America’s streets.

Investors bought dollars, sold stocks and fretted about inflation on Monday in a scramble to assess the risk of trade war after Donald Trump put tariffs on top U.S. trading partners.

U.S. futures and global stocks were hit by a selloff early on Monday as markets around the world braced for a potential trade war triggered by President Donald Trump’s decision to impose sweeping tariffs on imports from Canada, Mexico, and China—which he acknowledged will cause “some pain” for American consumers.

A growing number of countries, including American allies, are striking trade deals as the Trump administration erects a higher fence around its global commerce.

The president’s trade assault, which makes no distinction between ally and adversary, is an assertion of U.S. dominance with significant risks.

Wall Street opened lower after Trump's tariffs on Mexico, Canada and China, sparking fears of trade wars that'll slow economies and ignite inflation.

Investors braced for a potential trade war after President Donald Trump imposed tariffs on goods from Canada, Mexico and China and pledged future tariffs on the European Union.