CBC News's chief correspondent Peter Mansbridge sat down for exclusive one-on-one interviews with each of the main federal party leaders in advance of the election on Oct. 19.

The aim: to give voters a better sense of the leaders themselves and their politics. 

"The premise is simple; the execution a challenge," Mansbridge writes

"We requested the same thing from each of the parties: a full 30 minutes with their leaders, uninterrupted in a venue of their choice, but away from the campaign trail, away from the rallies and the whistle-stops and the media buses.

"The interviews would be wide-ranging. No topic was off limits, and, as with every one we do, no questions were provided beforehand."

One question that was particularly tricky for each of the leaders: "​What is it about you, that you feel should make you a prime minister?" The answers are surprising.

Watch all the interviews below. The videos appear in the order the interviews originally aired on CBC's The National

Stephen Harper

Mansbridge One on One: Stephen Harper22:44

Justin Trudeau

Justin Trudeau Interview with Peter Mansbridge30:03

Tom Mulcair

Tom Mulcair Interview with Peter Mansbridge32:46

Elizabeth May

Elizabeth May Interview with Peter Mansbridge24:39