Canada is the biggest supplier of steel and aluminum for the U.S. The metals are used for products like nuts and bolts, sheet metal, machining and beer cans. Will those levees be a problem for Minnesota companies that get their steel from Iron Range-mined ore and taconite?

Billions of dollars’ worth of American-made goods are now being targeted for increased tariffs, in retaliation for new taxes President Trump instituted on foreign-made steel and aluminum.