TORONTO — Canadian immigration authorities tried to deport the Toronto VIA Rail terror suspect nine years ago but never did so because, as a stateless Palestinian, he could not be sent to any other country, documents obtained by the National Post show. Raed Jaser was allegedly working illegally under several aliases when he was arrested in August 2004 on an outstanding immigration warrant. Officials wanted to deport him because he had a string of criminal convictions but were forced to set him free after two days. The government’s failure to deport Mr. Jaser allegedly proved costly for Canada: He and...