Abstract This paper establishes a dialogue between populism studies, typologies of reconstruction of the past, and argumentative dialectics. The paper analyzes what types of argumentative strategies are employed in the context of the discussions regarding Spanish memory politics and how those strategies can be associated with typologies of re-elaboration of the past (Caramani and Manucci 2019). Building from argumentative dialectics (Van Eemeren and Grootendorst 2004), the paper studies argumentation structures uttered after the endorsement of the 2007 Spanish Historical Memory Law and the proposal of the 2021 Draft Democratic Memory Law. Departing from the distinction between diverse strategies of re-elaboration of the past, namely, heroization and cancellation (Caramani and Manucci 2019), the paper questions if Spanish decision-makers’ rhetorical strategies and political decisions in the field of memory politics disclose the adoption of particular types of populist behavior. The paper claims that the argumentative tactics used, in the domain of memory politics, by Spanish left-wing leaders reveal the adoption of a heroization strategy. In contrast, the rhetoric of Spanish right-wing leaders favors a strategy of cancellation. The paper also claims that, in the Spanish case, mainly from 2018 onwards, the adoption by Spanish left-wing leaders of a heroization strategy had two consequences. First, it did not reduce the cultural opportunity structure for right-wing populism. Second, it fostered a cultural opportunity structure for the affirmation of left-wing populism. The paper selected argumentative dialectics as a methodological framework (Van Eemeren and Grootendorst 2004). The paper discusses the scientific significance of analyzing memory politics through the lenses of populism studies.