Since the separate independence of Senegal in June 1960, after the breakup of the Mali Federation, organized political opposition in Senegal has not been able to maintain the position which it enjoyed before independence. The failure of the opposition can be explained only in part by reference to the repressive measures adopted by the government over this period; it should also be seen as a result of the internal weaknesses of the opposition itself. The purpose of this article is to outline the various conditions which have enabled the governing party, the Union Progressiste Sénégalaise (UPS) of M. Leopold Sédar Senghor, to remain in power until the present time, despite its own lack of strict internal discipline or general sense of purpose.