One of the most powerful public servants of the 20th century has passed away. Former Clerk of the Privy Council Gordon Robertson died Tuesday in Ottawa. Robertson was a Rhodes Scholar, and youngest-ever Commissioner of the Northwest Territories. He went on to serve in the most seniors roles for every Prime Minster from William Lyon Mackenzie King to Joe Clark. He was a key advisor on Constitutional Reform and Federal - Provincial relations. Funeral arrangments are not yet finalized. Gordon Robertson was 95.