The aim of this paper is twofold. First, to study strategic disagreements, i.e., those situations in which one of the parties uses an expression that allows it to restructure the debate and, in this way, obtain some strategic advantage to advance its political agenda. The paper examines this type of disagreement in a specific context: the parliamentary debates in the Spanish Congress of Deputies during the VIII Legislature (2004-2008). Second, to show that strategic disagreements constitute antagonistic conflict dynamics, i.e., situations in which one or both parties are denied a morally adequate treatment of their points of view. In this way, strategic disagreements prevent the development of the dynamics necessary to manage the conflict in a cooperative way.