The allocation of resources is a crucial part of political decision-making in healthcare, but explicit priorities are rarely set when resources are distributed. Two areas that have received some attention in research about legitimacy and priority-setting decisions in healthcare are the role of technical expert agencies as mediating institutions and the role of elected politicians. This paper investigates a political priority-setting advisory committee within a regional authority in Sweden. The aim is to explore how a political body can serve as a mediating institution for priority-setting in healthcare by disentangling the arrangements of its work in terms of what role it performs in the organisation and what it should do. The findings illustrate that promoting the notion of explicit priority-setting and the political aspects inherent in priority-setting in political healthcare management can contribute to consolidating political governance and leadership. There is, however, a complex tension between stability and conflicting values which has implications for the role of politicians as citizens' democratic representatives. This paper enhances our understanding of the role of mediating institutions and political properties of healthcare priority-setting, as well as our understanding of political and democratic healthcare governance in local self-government.