The company plans to call back about 500 employees United States Steel Corp. X +4.25% said it would restart a blast furnace in Illinois to handle the higher demand it expects from President Donald Trump’s proposed tariffs on foreign steel. The steelmaker said it also plans to call 500 employees back to work at the Granite City mill. U.S. Steel idled its blast furnaces there two years ago as a flood of cheap imports pushed down domestic steel prices. Steel producers have been hurt in recent years by increasing competition from foreign competitors, particularly China, that have ramped up production...