President Trump said he plans to impose 25% tariffs against all steel and aluminum imports into the U.S. on Monday.

Mr. Trump’s decision to impose tariffs on metals is not new. In his first term, the president levied tariffs on foreign steel and aluminum globally, angering allies like Mexico, Canada and the European Union. He ultimately rolled back some of those barriers on Canada and Mexico when they signed a revised trade agreement with the United States.

The promised tariffs on steel and aluminium come as Trump has launched his second term with an aggressive trade policy. Last week he came within hours of setting 25 per cent tariffs on imports from US neighbours Canada and Mexico, only to offer them a 30-day reprieve.