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Brittany is a useful case for understanding the distortion between the existence of a potential for identity and the weak influence of ethno-regionalist parties. In this region, regionalist forces have never succeeded in achieving significant political results. Thus the Democratic Union of Brittany ( Union Démocratique Bretonne – UDB) comes across as an exception because this party structured a left-wing regionalist movement until the middle of the 1960s. Even if its electoral impact remains weak, for the past ten years, the UDB has implemented a process of ideological renewal. By renewing its traditional alliances, the UDB attempts to increase its political representation in regional