Mild-mannered Canada shows the world how to take the fight to Trump

For anyone who has spent time living in Canada, the country’s default posture towards its southern neighbour has long felt almost hard-coded: polite, deferential, almost allergic to confrontation.
I saw this first-hand as a visiting scholar in the country in the early 1980s, when I met locals who embodied the national stereotype of moderation in all things. Canadians preferred compromise even when they had a right to push back, treating their far larger ally as a partner to be accommodated, not...