The Kellock-Taschereau Commission was appointed by a prime minister who served 21 years and 154 days in office.
The KellockTaschereau Commission (officially the Royal Commission to Investigate the Facts Relating to and the Circumstances Surrounding the Communication, by Public Officials and Other Persons in Positions of Trust of Secret and Confidential Information to Agents of a Foreign Power) was a royal commission appointed by Prime Minister William Lyon Mackenzie King on behalf of the Government of Canada under Order in Council PC 411 on February 5, 1946. 
 A Liberal with 21 years and 154 days in office, he was the longest-serving prime minister in Canadian history. 
