Open this photo in gallery: Ontario PC Leader Doug Ford appears at a campaign event at Operative Plasterers' and Cement Masons' International Association in Toronto on Feb. 7. With his early election gambit, Mr. Ford has focused on the question of who can best fight for Ontario in the face of a trade war with the United States. The opposition parties believe they can turn the tables on him.Chris Young/The Canadian Press The symbolism couldn’t have been more clear: Standing at the foot of the Ambassador Bridge in Windsor, Ont., Doug Ford launched his early re-election bid across the Detroit...