The relationship between journalists and politicians is one between conflict and cooperation shaping citizens’ linkage to political life in specific political, economic, cultural and technological contexts, indicate studies dealing with various research branches – from public sphere debates, explorations of media systems, investigations of societal roles of media and journalism, to news making processes. The latter branch has most thoroughly investigated the journalists-politicians relationship, labelling it for instance as an “ambivalent relationship” (Kumar), “spiral of cynicism” (Brats et al.) or “exercise in powerplay” (Ross). Negotiating the agenda-setting of news does not suggest that information is linearly transmitted from information sources to journalists and then to the citizens, but is rather a complex set of processes importantly shaped by roles, power and interaction. In terms of socially prescribed behaviour of a position holder and in accordance with counter- position holder study identify interplay of journalists’ roles with those of politicians – being “reflexively related” (Fishman) or appearing through “divergent (though overlapping) purposes” (Blumler and Gurevitch). Additionally, with social media and micro-blogging gaining relevance it appears that the journalists-politicians relationship gained additional complexity as more direct engagement of politicians with citizens is at least potentially facilitated online and as journalists are having trouble of distinguishing themselves from the “people formerly known as the audience” (Rosen 2012). “Ambient” communication namely introduces broad and always-on platforms creating various kinds of interactions of different social actors around and within the news. Except in rare accounts dealing with structural interconnectedness of journalists’ and politicians’ Twitter networks, articulations of journalists-politicians relationship on social media have been explored only superficially. Therefore, this paper attempts to fill this research gap and investigate some unexplored questions. How have journalists-politicians relationships transformed with the rise of social media? How have articulations of their social roles and power shifted? How have these dynamics reshaped agenda-setting? By focusing on dynamics between open and often fragmented communication with decentralized dynamics and institutionalized communication practices of news institutions and political parties the study investigates social negotiation of roles among Slovenian journalists and politicians through insights from quantitative analysis of Twitter conversations between journalists and politicians in a month before the parliamentary elections in 2011 and in-depth interviews with journalists, prolific party members and campaign team leaders that engaged in direct communication on Twitter.