He became CBC's foreign correspondent in London in 1982 where he worked until joining NBC as a foreign correspondent in 1985. Stewart returned to Canada in 1987 to become senior reporter with the CBC's The Journal, a post in which he wrote and hosted a series of specials on North American and world politics.
In 1982, Stewart was appointed as CBC's foreign correspondent based in London; he held this role until 1985 when he moved to NBC. In 1987, he returned to Canada to take up a senior reporting position with the CBC's The Journal, where he authored and presented special segments on North American and world politics.