Stephen Harper will speak to party members on Thursday evening at the Conservative Party's policy convention in Vancouver. It could be some of the last words he will speak in public as an elected member of Parliament.

Canada's 22nd prime minister is expected to resign his Calgary Heritage seat before the fall, a seat he has held since returning to federal politics in a by-election in 2002.

As leader of the Canadian Alliance, Harper led the party into a merger with the Progressive Conservatives in 2003. He then led the merged party to power in 2006, where it remained until it was defeated by Justin Trudeau's Liberals in October.

Harper's 10 years in office have left an impact on the political landscape of the country and shaped the modern Conservative Party. How will Canadians remember his time as prime minister and what will the Conservative Party look like without the only permanent leader it has ever known?

Joining host Éric Grenier to look at Stephen Harper's legacy and the future of the Conservative Party is Postmedia's Ottawa political bureau chief, John Ivison.

Listen to the full discussion above — or subscribe to the CBC Pollcast and listen to past episodes.