Recently declassified material shows the RCMP were spying on Tommy Douglas the leader of the Federal NDP as he called for a probe of the RCMP in April of 1963. The RCMP were drafting memos casting suspicion on Douglas' own activities.
The Library and Archives Canada had fought for six years to keep the RCMP files on Douglas secret. The new pages became available when a federal judge ordered a review the nine volume dossier with a view to releasing more. The pages released are still fragmentary. Over two hundred pages of the dossier remain entirely secret.
this article. For more about Douglas see this site.