Who was the Second longest serving Prime Minister in Canada?

Justin Trudeau (Member of Parliament for Papineau) is currently the twenty-third Prime Minister of Canada. He is the leader of the Liberal Party of Canada, and became prime minister after his party won a majority of the seats in the House of Commons in the 2015 Canadian federal election. He is currently also the Minister of Intergovernmental Affairs and Youth.

The Prime Minister is appointed by the Governor General of Canada as the person most likely to hold the confidence of the House of Commons, and is not directly elected. A Prime Minister who loses the confidence of the House of Commons is expected to resign. By convention, the Prime Minister is also expected to be an elected Member of Parliament, though this is not a condition for holding office. A Prime Minister who doesn't have a seat in the House of Commons will typically try to win a seat in a by-election by having a member of their party resign their seat.

Below is a list of Prime Ministers of Canada including political party affiliation and terms in office :

Justin Trudeau

Liberal

Nov. 4, 2015 - incumbent

Stephen Harper

Conservative

Feb. 6, 2006 - Nov. 4, 2015

Paul Martin

Liberal

Dec. 12, 2003 - Feb. 6, 2006

Jean Chretien

Liberal

Nov. 4, 1993-Dec. 12, 2003

Kim Campbell

Prog. Cons.

June 25, 1993-Nov. 4, 1993

Brian Mulroney

Prog. Cons.

Sept. 17, 1984-June 25, 1993

John Turner

Liberal

June 30, 1984-Sept. 17, 1984

Joe Clark

Prog. Cons.

June 4, 1979-Mar. 3, 1980

Pierre E. Trudeau

Liberal

Mar. 3, 1980-June 30, 1984

Apr. 20, 1968-June 4, 1979

Lester B. Pearson

Liberal

Apr. 22, 1963-Apr. 20, 1968

John Diefenbaker

Prog. Cons.

June 21, 1957-Apr. 22, 1963

Louis St. Laurent

Liberal

Nov. 15, 1948-June 21, 1957

R. B. Bennett

Conservative

Aug. 7, 1930-Oct. 23, 1935

Mackenzie King

Liberal

Oct. 23, 1935-Nov. 15, 1948

Sept. 25, 1926-Aug. 6, 1930

Dec. 29, 1921-June 28, 1926

Arthur Meighen

Conservative

June 29, 1926-Sept. 25, 1926

Unionist

July 10, 1920-Dec. 29, 1921

Sir Robert Borden

Unionist

Oct. 12, 1917-July 10, 1920

Conservative

Oct. 10, 1911-Oct. 12, 1917

Sir Wilfrid Laurier

Liberal

July 11, 1896-Oct. 6, 1911

Sir Charles Tupper

Conservative

Apr. 27, 1896-July 8, 1896

Sir Mackenzie Bowell

Conservative

Dec. 13, 1894-Apr. 27, 1896

Sir John Thompson

Conservative

Nov. 25, 1892-Dec. 12, 1894

Sir John Abbott

Conservative

June 15, 1891-Nov. 24, 1892

Alexander Mackenzie

Liberal

Nov. 5, 1873-Oct. 9, 1878

Sir John A. MacDonald

Conservative

Oct. 9, 1878-June 6, 1891

July 1, 1867-Nov. 5, 1873