Liberals of all countries, unite! Just as anti-liberal powers outside the west are becoming stronger than ever, the assault on everything we stand for has been joined by the United States. Against this massed onslaught of anti-liberal nationalists we need a determined fightback of liberal internationalists. Canada’s election this week can contribute a strong mounted brigade. A core insight of liberalism is that, if people are to live together well in conditions of freedom, power always needs to be dispersed, cross-examined and controlled. Faced with the raw, bullying assertion of might, whether from Washington, Moscow or Beijing, we now have...