President Donald Trump says he will also impose "reciprocal tariffs" on any countries who place tariffs on the US.

If they are charging us 130% and we’re charging them nothing, it’s not going to stay that way,” he told reporters.

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.

U.S. President Donald Trump said he will announce on Monday that the United States will impose 25 per cent tariffs on all steel and aluminum imports, including from Canada and Mexico — a move that prompted sharp criticism from some provincial premiers.

President Trump delayed aggressive tariffs on imports from Canada and Mexico, but people close to him warn that more duties are coming—and won’t so easily be averted.

Shares in European and Asian steelmakers fell on Monday after U.S. President Donald Trump said he would introduce 25% tariffs on all steel and aluminium imports within hours in addition to existing metals duties.

Trump said on Sunday he would introduce new 25% tariffs on all steel and aluminium imports into the U.S., on top of existing metals duties, in another major escalation of his trade policy overhaul. Starmer's spokesman said while it was not possible to speculate on the impact of such tariffs without seeing details,