Paul Gross as PM of Canada John Diefenbaker in 'Prairie Giant The Tommy Douglas Story' 2006

Yes, Paul Gross has played Diefenbaker, and had a wolf-husky companion named Diefenbaker. Plus he's played a Mountie (RCMP Officer) at least three times in his career (as well as a police officer in "Wilby Wonderful")... Yet another pattern in his career has twice played the role of Prime Minister of Canada (as JD and as fictitious PM Tom McLaughlin), topping that off with a run for the Presidency of the fictitious amalgamated USA/Canada country, also as Tom McLaughlin. But I digress!