Politicians and industry leaders have long pushed to remove barriers to interprovincial trade. Trump’s tariffs are giving the effort new momentum.

Trump said the U.S. has not 'had a lot of luck' with Canada during negotiations on a new trade and security deal, suggesting the two countries may end up with no new agreement.

A three-day meeting in response to President Trump’s looming tariff threat underscored differences between the leaders of Canada’s provinces and territories.