Trade Minister Chrystia Freeland worries about a growing global wave of protectionism. She should worry. If Donald Trump is elected president in November, he could deliver on his trade threats. NAFTA could be terminated. Congress could not stop him. The Donald has said he likes Canada and Canadians. Hopefully, he does not “like” us in the same way that he “likes” Mexicans, Hispanics and the other targets of convenience in his crosshairs.