US President Donald Trump’s new 25% tariffs on imports from Mexico and Canada, along with a doubling of duties on Chinese goods to 20%, took effect on Tuesday, sparking fresh trade tensions with the country’s top three trading partners. In response to the US fentanyl overdose crisis, President Trump escalated the 10% tariff on Chinese imports imposed in February, doubling it to 20%. The tariff measures were implemented at 12:01 a.m. EST (0501 GMT), just hours after Trump announced that the three nations had not done enough to halt the influx of the deadly fentanyl opioid and its precursor chemicals into the US.