The U.S. Supreme Court is currently hearing arguments on whether President Donald Trump has the authority to impose tariffs under the International Emergency Economic Powers Act (IEEPA). One thing is clear, however: America needs trade tools that are effective and can advance the national and economic security interests of the United States.

That’s why the Section 232 steel tariffs—reimposed without exceptions or exemptions nine months ago, and strengthened in June to a 50% rate—deserve renewed appreciation. Rooted in the Trade Expansion Act of 1962, and reviewed by the Department of Commerce for national security purposes, Section 232 tariffs stand on firm legal ground. They’ve been tested, upheld, and proven to work.

A new report by the Coalition for a Prosperous America (CPA) shows why. Since these tariffs were introduced in 2018, they’ve revitalized U.S. steelmaking capacity—spurring 21 million metric tons of new or expanded investment. That’s the largest build-out in decades.

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