In a significant move aimed at bolstering domestic industries and addressing perceived national security threats, President Donald J. Trump today issued a proclamation dramatically increasing tariffs on imported steel and aluminum articles and their derivatives.

Effective 12:01 a.m. Eastern Daylight Time on June 4, 2025, the ad valorem tariff rate on these goods will jump from 25 percent to 50 percent.

The proclamation, signed by President Trump, states that the increased tariffs are “necessary to adjust the imports of steel and aluminum articles and their derivative articles so that such imports will not threaten to impair the national security.”

It asserts that the heightened tariffs will “more effectively counter foreign countries that continue to offload low-priced, excess steel a

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