U.S. President Donald Trump said on Sunday he will introduce new 25% tariffs on all steel and aluminum imports into the U.S., on top of existing metals duties, in another major escalation of his trade policy overhaul.

The president imposed a 25 percent tariff on global metals, repeating a move from his first term. Economists and foreign governments know what will come next.

In yet another major escalation of his trade policy overhaul, US President Donald Trump announced that on Monday the United States will impose 25 per cent tariffs on all steel and aluminium imports, which would come on top of additional metal duties.