MPs face a dilemma when it comes to deliberative mini-publics (DMPs): in a context of distrust, they may see it as an opportunity to re-legitimize themselves and solve complex policy issues. But it could also challenge the quasi-monopoly they used to have on political decisions and undermine the role of the Parliament and the primacy of elections. The article is found on 91 face-to-face interviews with French-speaking Belgian MPs sitting in federal or regional parliaments. First, we describe the profile of supporters of DMPs. We then identify three ideal–typical discourses: the power-sharing discourse, the consultative discourse, and the elitist discourse. The contribution of this article is twofold. First, it analyzes the argumentative frames used by MPs to assess deliberative mini-publics using a large number of interviews. Second, it demonstrates that their discourses depend on their evaluation of ordinary citizens’ competence to participate and on their resulting vision of representation. Political actors mainly perceive DMPs as power-sharing instruments that would alter their elected position and the legitimacy of the election.