Former Mexican President Vicente Fox said on Friday he expected Congress to pass its new law to legalize cannabis next week, a move that would effectively create one of the world’s largest weed markets. The bill, backed by the administration of President Andres Manuel Lopez Obrador, would mark a major shift in a country bedeviled for years by violence between feuding drug cartels. Fox, a director at Colombian-Canadian Khiron Life Sciences (KHRN.V…