Live updates: US-Canada trade war details surface; Trump to take honor lap in IndyCar Grand Prix

Details of the failed U.S.-Canada trade negotiations, which sparked tit-for-tat 50 percent tariffs on certain goods, are now coming to light. U.S. Trade Representative Jamieson Greer said in a Saturday evening interview with The New York Times that, before this weekend, officials had offered to reduce tariffs, but the talks ultimately collapsed.