Now they have a trade war problem to worry about again. Stocks and the dollar fell Friday after President Donald Trump brought the trade war back to the forefront with threats of massive tariffs against one of America’s most valuable companies and one of its most important trading partners.

President Donald Trump’s moves Friday to reignite his global trade war laid bare the administration’s bubbling frustration with resistance from both corporations and foreign countries unwilling to rapidly bow to U.

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,

Stocks ended lower but off lows, sizing up Trump's new tariff threats against Apple and EU. Treasury yields also eyed as big tax bill progresses.

U.S. stocks are falling after President Donald Trump threatened 50% tariffs on the European Union that could begin in a little more than a week.

The former president has just one official event, a closed-press signing of executive orders, on his public schedule before he heads out of Washington by mid-afternoon