U.S. President Donald Trump's tariff decisions since he took office on January 20 have shocked financial markets and sent a wave of uncertainty through the global economy. Here is a timeline of the major developments: February 1 - Trump imposes 25% tariffs on Mexican and most Canadian imports and 10% on goods from China,

When President Trump rocked the economy with an unprecedented attack on global trade in April, the plan was dismissed as swaggering, capricious and unsustainable.