To what extent are political decision-making processes mediatized in Switzerland? Based on this initial question, this Ph.D. thesis analyzes media coverage and parliamentary actors' (MPs) strategies and perceptions in three conflicted decision-making processes. Mediatization of politics has become an important concept in political communication and mass media research and refers to behavioral changes and adaptations of political actors, institutions, and processes that are related to (mass) media. Conceptually, the thesis draws on the recent literature on mediatization and suggests an original framework to analyze the mediatization of politics. Empirically, the mediatization of media coverage is investigated by means of a content analysis of six Swiss daily newspapers (N=507). MPs' strategies and perceptions are assessed in face-to-face interviews (N=50). The thesis finds that MPs of the pole parties are more mediatized than MPs of the center-right parties and shows that mediatization of politics is not a fate, but a strategic choice.