U.S.-Canada trade talks collapse, massive tariffs to take effect

Trade talks between the U.S. and Canada fell apart late Friday night, and both sides said steep new tariffs will go into effect. Why it matters: It's an unprecedented breakdown in relations with the second-largest U.S. trading partner. Catch up quick: Trump last month threatened to invoke Section 338 of the Tariff Act of 1930 to hit a slew of Canadian goods with additional 50% duties, including…