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The role of institutional factors on party system change has received increasing scholarly attention. This article analyses the emergence of new trends in the structure of party competition in Turkey following the transition from parliamentarism to presidentialism in 2017. The newly-adopted presidential system endowed the president with extraordinary powers and reduced the role of the parliament. Presidential elections assumed central importance in electoral politics; competition was structured by pre-electoral coalitions and party alliances; more than two-thirds of the voters cast their ballots for one of the two main electoral alliances; and there was a trend towards the emergence of a bipolar party system. The analysis presented in this study emphasizes the role of institutional engineering, especially the introduction of presidentialism and changes in electoral laws, as major factors in the restructuring of the Turkish party system.
Sayarı et al. (Wed,) studied this question.