The aim of this article is to analyze the influence level and boundaries that media have on politics. Specifically, we study the power of media to set the public agenda, to set the political agenda determining the decision-making process, and to generate political disaffection through the politicians’ and journalists’ perceptions. We have used a methodology based on in-depth interviews applied to a wide sample of 45 individuals. The analysis is focused on the European context; the case study is based specifically on Spain. Results show a high level of mediatization of politics, but also reveal limits to the political influence of the media. These boundaries of the media influence on politics affects political agenda setting and its ability to generate civic engagement. Moreover, we have detected four media engagement boundaries that boost the citizens’ political cynicism.