Open this photo in gallery: Prime Minister Justin Trudeau takes part in an interview in Ottawa on Dec. 11. Canada moved Tuesday to call for a “sustained ceasefire” in Gaza.Sean Kilpatrick/The Canadian Press U.S. President Joe Biden may or may not have had Canada in mind when he warned this week that Israel is losing international support amid the soaring civilian death toll its army has wrought in Gaza. Canadian foreign policy rarely catches Washington’s attention unless it involves some bilateral irritant that has upset one faction or another in Congress. But Canada’s move to join Australia and New Zealand...