Head of government
William Lyon Mackenzie King
As head of government

William Lyon Mackenzie King, Prime Minister of Canada, was head of government when 1 recorded incident took place. The official who acted in each may be someone else; each incident names them.
Tactics used
Incidents
| Date | Incident | Country | Tactic | Outcome |
|---|---|---|---|---|
| 3 September 1939 | Canada: War Measures Act regulations authorize review of hundreds of newspapers and ban political organizations | Canada (RSF 2026 rank: 20th of 180) | Prior restraint | Sustained (31 December 1945) |