Former prime minister Pierre Trudeau shows how tall his eldest son Justin has grown in relation to himself during the seventh inning stretch at the Montreal Expos game in Montreal on April 20, 1987. The Canadian Press/Paul Chiasson (Paul Chiasson/Canadian Press)

Here are some facts about the political career of Liberal Leader Justin Trudeau, the prime minister designate, and his father, former prime minister Pierre Elliott Trudeau:

Year/age when first elected to house: 

Justin — 2008, age 37. Pierre — 1965, age 46.

Year/age of becoming Liberal leader:

Justin — April 14, 2013, age 42. Pierre — April 20, 1968, age 49. 

Riding: 

Justin — Papineau. Pierre — Mount Royal.

Year of first general election as party leader:

Justin — 2015. Pierre — 1968. 

First campaign slogans:

Justin in 2015 — "Real Change." Pierre in 1968 — "Come Work with Me." 

Campaign Songs:

Justin in 2015 — "The Veldt" by Deadmau5. Pierre in 1968 — None. 

Number of national televised leaders debates:

2015 — 5. 1968 — 1. 

Outcome of campaigns:

Justin — To be determined on Oct. 19. Pierre — Elected with a majority government. 

Population then and now according to Statistics Canada:

In 2015 — 35,749,600. In 1968 — 20,701,000. 

Number of seats now and then:

2015 — 338. 1968 — 264. 

Issues of the day now and then:

2015 — Economic stability, Syrian refugee crisis, anti-terrorism measures. 

1968 — Quebec sovereignty, affordable housing, poverty rates. 

Pierre Trudeau is saluted by RCMP Officer as he carries son Justin into Rideau Hall in 1973 to attend an outdoor reception for visiting heads of the Commonwealth countries in Ottawa. As a child, Justin didn't know exactly what his dad did other than that he was "boss of Canada." (Peter Bregg/Canadian Press)