According to The Wall Street Journal, China and the European Union announced retaliatory measures in response to the Trump administration's 25% tariffs on steel and aluminum imports. The EU will impose tariffs on U.S. products, including bourbon and motorcycles, starting in April. China vowed to take “all necessary measures” in response. U.S. stock indexes saw their steepest two-day decline since August, with the Dow, S&P 500, and Nasdaq all falling.