Trump's roller-coaster day saw him threaten to double duties on Canadian steel and aluminum to 50% after Ontario announced plans to place a surcharge on electricity sent to the US only to retreat back

US President Donald Trump has said he will now double tariffs on Canada's steel and aluminium products from 25 to 50 per cent.

Trump has hiked tariffs by 25 per cent to 50 per cent on Canadian imports into United States amid an escalating trade war with the country after Ottawa imposed reciprocal duties. Trump has further threatened Canada to revisit its tariffs on American products and services or be ready to get more.