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.

Trump has tried to assure the public that his tariffs would cause a bit of a “transition” to the economy, with the taxes prodding more companies to begin the years-long process of relocating factories to the United States to avoid the tariffs.