Canada's digital tax sparks rift with US

Canada is facing renewed trade tensions with the United States after the latter abruptly cut off all trade negotiations, citing Ottawa's digital services tax as the reason.

US President Donald Trump announced on Friday that the US would immediately halt all trade talks with Canada, calling Ottawa's DST a "direct and blatant attack" on the country.

Julian Karaguesian, a professor of economics at McGill University in Montreal, said Trump's move is unfair.