President Donald Trump ratcheted up tariffs on Canada late Thursday, stoking tensions with a top U.S. trade partner as the two sides try to hash out a trade agreement by the end of the month. The Dow Jones Industrial Average tumbled 250 points,

President says Canada’s tariff retaliation, lack of progress on curbing fentanyl smuggling is behind new import penalty

P resident 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.