In the shadow of King Charles’ visit to the White House lie the contrasting leadership lessons of three of lands once ruled by Great Britain––the United States, Australia, and Canada. Even now, there are prominent voices among our foreign allies who believe President Donald Trump can be ignored or dismissed outright. Those same voices often argue that nothing can be done about Trump anyway. Such overconfidence is the fertile ground that provides the complacency which nourishes authoritarianism, and such complacency is the complicity upon which Trump and other demagogues rely.

Australia is a case in point.…