Specifically, STLD is part of a group of U.S. steelmakers including Nucor and U.S. Steel that has pushed for antidumping legislation to combat cheap imports of corrosion-resistant steel products (CORE) from Mexico and Canada.

Steel stocks rallied early Monday. The reason isn’t hard to figure: It’s about tariffs. The harder thing to figure out was why gains didn’t last. Over the weekend, President Donald Trump went ahead with his plan to put 25% tariffs on goods from Mexico and Canada,

In a Tuesday interview with CNBC’s Jim Cramer, Nucor CEO Leon Topalian expressed optimism about what Trump’s tariff policies mean for the U.S. steel industry.