The Electoral Paradox of Party Institutionalisation: The Case of PKS in Eastern Indonesia.

What caused the surprising electoral success of an Islamist party in one of Indonesia's most Catholic regions, and why was this success short-lived? This article argues that in Ngada district on Flores Island in 2014 the Prosperous Justice Party (PKS) deftly mobilised local voters not because of its own organisational and programmatic discipline but because of its "project of commonness", or adaptation to prevailing local patterns of personalistic local electoral competition. The party's growing popularity in Ngada, however, paradoxically fell after it sought to build solid and coherent relations with the electorate in preparation for the subsequent election. The case of the PKS in Flores thus suggests that under certain conditions, in which voter–party linkages are highly fragmented and cleavage-based politics remain undeveloped, party institutionalisation can harm electoral performance. [ABSTRACT FROM AUTHOR]