If the trade war hobbles Canada's auto sector, let's just phase it out

Open this photo in gallery: Chrysler Pacificas are loaded onto a transport truck at the Windsor Assembly Plant in Windsor, Ont., on March 6.Dax Melmer/The Globe and Mail Christopher Worswick is chair of the economics department at Carleton University and a research fellow at the C.D. Howe Institute. Among his many threats this week, U.S. President Donald Trump vowed to "permanently shut down" Canada's automobile industry with tariffs on Canadian cars coming into the U.S. Ottawa should threaten Mr. Trump with retaliatory tariffs on American automobiles and parts entering Canada. Canadian consumers have numerous high-quality alternatives from Asia, making it…