For months President Donald Trump has been slapping higher tariffs on practically every country’s exports to the United States, citing emergency economic powers.

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 Trump, who has insisted Aug. 1 is a firm deadline for countries around the world, said that "the complexities of a Deal with Mexico are somewhat different from other Nations."

On Thursday, Donald Trump announced sweeping new tariffs against U.S. trading partners that will go into effect next week. The announcement came on the same day that an appeals court grappled with the question of whether Trump’s tariffs are even legal.