Ottawa, March 28 -- In a dramatic shift in Canada's foreign policy, Prime Minister Mark Carney on Thursday declared that the long-standing economic and security relationship between Canada and the United States has ended, responding to US President Donald Trump's announcement of new auto tariffs that could severely impact Canada's economy, Politico reported.

"The old relationship we had with the United States, based on deepening integration of our economies and tight security and military cooperation, is over," Carney stated on Parliament Hill after breaking from the federal campaign trail in response to Trump's latest threats.

Trump announced Wednesday that his administration would impose a 25 percent tariff on auto imports from Canada...