Trump’s Tariffs on Steel and Aluminum Go Into Effect

President Trump’s sweeping tariffs on foreign steel and aluminum went into effect on Wednesday, escalating America’s trade spats with global competitors, including close allies already reeling from his on-and-off approach to trade penalties.

Mr. Trump’s tariffs of 25 percent on the metals hit imports that enter the United States from any country in the world. The move, which many domestic steel and aluminum makers support, is expected to raise costs for American manufacturers of cars, tin cans, solar panels and other products, potentially slowing the wider U.S. economy.