Trump levied sweeping tariffs on key trading partners Mexico, Canada and China early Tuesday morning, sparking retaliation from Beijing and Ottawa, sending the stock market into a tailspin, and alarming government officials around the globe as they brace for potentially the worst trade war in a century.

US President Donald Trump's 25% tariffs on imports from Mexico and Canada took effect, alongside increased duties on Chinese goods, igniting trade conflicts with key partners. Beijing and Ottawa retaliated with their own tariffs.

President Donald Trump’s levies against China, Canada, and Mexico took hold Tuesday, and Beijing and Ottawa wasted no time in hitting back. China’s finance ministry said it would impose duties ...

Beijing responded by slapping additional tariffs ... Canadian Prime Minister Justin Trudeau, meanwhile, said Ottawa would impose immediate 25% tariffs on more than $20 billion worth of U.S ...