Great post. I explained this here some years ago without your clarity and detail. In the biggest newsrooms, a conservative was a rare species in my time and there has been little change. CBC TV Toronto had one while I was there and CBC Radio-Canada Montreal none.

The interesting part is that media owners permitted workers to report as they saw it, and Parliament demanded politicians keep their hands off the publicly funded CBC.

(I was involved directly when prime minister Diefenbaker tried to prevent JFK's live missile crisis address to the US appearing on the Canadian network at 7p. I said OK but the story would be in the Toronto Star's bulldog edition at 9p. The public won.)