What happen to the YV when facing the electoral dilemma? Despite their rejection of political institutions, the French municipal elections of 2020 led some of the participants to embrace conventional politics. Under which circumstances can a social movement lead to political participation and eventually obtain electoral success? Relying on quantitative and qualitative data, this article provides an explanation of the electoral participation of social movement activists and the different outcomes of local elections in Bordeaux, one of the major sites of Yellow Vests’ mobilization in 2018-2019. The article contends that far from allowing marginalized groups to enter the political arena, these elections seem to confirm the “iron law of oligarchy”. Two lists of candidates both claiming to be part of the Yellow Vest movement competed with each other. While “Bordeaux Democracy” rejected partisan support failed to stand, “Bordeaux in Struggle” could rely on organizational support and was able to maintain itself and achieved unexpected electoral success with three local councillors.