The U.S. president pulled the plug on monthslong negotiations over what he called an “egregious” digital-services tax on U.S. tech companies, plunging relations with America’s second-largest trading partner back into turmoil.

President Donald Trump said he was ending all trade discussions with Canada in retaliation for the country’s digital services tax, and threatened to impose a fresh tariff rate within the next week.“Based on this egregious Tax,