Democratizing candidate selection: Controlled turnover in Botswana’s <i>Bulela Ditswe</i> primaries

Why do political parties implement primary elections? With multi-party elections firmly established, political parties in many young democracies have begun to democratize internally by adopting mass primaries. Previous work argues that parties institute primaries to select for high quality candidates, incentivize campaigning effort, and reduce intra-party conflict. In this paper, I theorize that parties also implement mass primaries to open up the political elite while protecting their most senior members. Consistent with this hypothesis, using original data from Botswana’s ruling party, I find that primaries facilitate a limited and controlled turnover, decreasing the likelihood of re-nomination of long-term incumbents in favor of political newcomers while still protecting senior ministers. Combined with qualitative and historical evidence, these results suggest that electorally successful political parties may implement mass primaries to replace unpopular and entrenched leaders.