The purpose of this paper is to devote, from the viewpoint of mass communication research and persuasion strategy, some reflections on thepolitical propaganda campaign conducted after an unexpected dissolutionof the Parliament. The analysis starts from a operational communicationmodel.The unexpected character of the dissolution carriers several problems of communication strategy: the basic data of the marketing situation are deficient, the delimitation ( with priorities) of target audiences is problematic, the choice of manipulative variables becomes a matter of pure experience.In this context the author gives bis opinion about the campaigns elaborated on the occasion of the last parliamentary elections in Belgium: he ascertains a normal link to the actual social and cultural problems of the Belgian society, an orientation to a large and heterogeneous audience, but also a lack of central themes in the propaganda.The proposed operational model, in part inspired by advertising theories (Warneryd-Nowak), seems to be a useful complement to the classic lists of practical recommendations drawn up in propaganda literature.