President Trump's tariff actions rattled markets.After months of threatening to levy tariffs on imports from countries he blames for facilitating the flood of fentanyl into the U.S., on Saturday, President Donald Trump did just that. He announced the imposition of new 25% tariffs on imports to the U.S. from its top two trading partners, Mexico and Canada. The country's third biggest trading partner, China, got hit with a 10% increase in its tariffs as well. U.S. stock markets are reacting as you might expec ...