President Donald Trump late Thursday threatened a 35% tariff on goods imported from Canada, a dramatic escalation in an on-again, off-again trade war with America’s northern neighbor and one of its most important trading partners.

President Donald Trump said the U.S. will impose a 35% tariff on all Canadian goods from Aug. 1 and threatened a blanket 15 to 20% levy on most other nations.

President Donald Trump threatens Canada with a 35% tariff, further disrupting the economic relationship with one of the United States’ closest allies and biggest trading partners. He told Meet the Press moderator Kristen Welker that he plans to set a blanket tariff of 15%-20% on most nations,