North America came within hours of a multibillion dollar trade war that was poised to hobble the economies of Mexico and Canada.The Times journalists Ana Swanson, Matina Stevis-Gridneff and Simon Romero discuss the last-minute negotiations that headed off the crisis — for now.Guests: Ana Swanson, who covers trade and international economics for The New York Times; Matina Stevis-Gridneff, the Canada bureau chief for The New York Times; and Simon Romero, an international correspondent for The New York Times based in Mexico City.Background reading: