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,

President Donald Trump warns of economic ruination if courts rule against his tariffs after the U.S. Court of International Trade blocks emergency import taxes.

This week’s ruling blocking many of the president’s tariffs will not lift those on Canadian cars, steel and aluminum. A trade expert explains what’s next.