The mechanism for appointing the President of the European Commission has undergone a significant change in the post-Lisbon era. The introduction of the Spitzenkandidaten system, in the lead up to...Show moreThe mechanism for appointing the President of the European Commission has undergone a significant change in the post-Lisbon era. The introduction of the Spitzenkandidaten system, in the lead up to the 2014 European Parliamentary elections, marked a distinct shift in the inter-institutional power balance between the European Council and the European Parliament. As a consequence of the appointment of Jean-Claude Juncker as Commission President, the European Parliament had exerted considerable influence, despite not having a clear legal mandate. However, the shift in the inter-institutional balance of power was temporary. The Spitzenkandidaten system did not become codified in the Treaties and the future of the system became a subject of debate. A shift occurred in the 2014-2019 inter-election period, culminating in the non-implementation of the appointment mechanism in 2019. This thesis will trace historically the evolution of the Spitzenkandidaten system, recount the appointment procedure in 2014 and analyse the ensuing inter-institutional power struggle between the European Council and the European Parliament. To explain the non-implementation of the Spitzenkandidaten system in 2019, Müller Gomez, Wessels and Wolters (2019) theoretical approach to inter-institutional relations is implemented. In doing so, the thesis contributes to a wider debate about the institutional architecture of the EU and the balance of power between the institutions, i.e., the interplay between supranationalism and intergovernmentalism.Show less