On Oct. 14 Stephen Harper won re-election as Canada's prime minister. In most modern liberal democracies that would be interpreted as a voter preference for Mr. Harper's leadership to continue. But soon after election day, Canada's hard-left New Democratic Party and the separatist Bloc Quebecois Party began plotting to overthrow the PM in Parliament. And last week, with the help of the Liberal Party, they tried to schedule a vote of no-confidence to carry out their plan. A demonstrator in Vancouver, Dec. 6. Mr. Harper fought back by appealing to the governor general for permission to suspend Parliament until Jan....