US tariffs on steel, aluminum imports to start March 12, says Donald Trump; signs executive order

US President Donald Trump on Monday announced he would slap 25 percent tariffs on steel and aluminum imports starting March 12, stepping up a long-promised trade war despite warnings from Europe and China.

"I have determined that steel articles imports from these countries threaten to impair the national security, and I have decided that it is necessary to terminate these arrangements as of March 12, 2025," Trump said in an executive order.

Also read: Trump raises tariffs on aluminum, steel imports in latest trade war salvo


He issued a separate order concerning aluminum imports.

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