This article portrays the relationship of populist parties, far-right online action and journalistic media by analysing the consequences of a Finnish populist party mobilizing resources created in an online community of anti-immigration activists. How have the traditionally centre-left-populist Finns Party’s attempts of utilizing the far-right-leaning online network Hommaforum contributed to the mediated negotiation over the party’s identity? The study analyses discursive exchanges between Finnish political journalists, the party leader Timo Soini and Hommaforum activists pertaining to the party’s affiliation with racism and extremism during 2008–2015. As a case study, the article discusses the implications of online action diffusing into institutionalized politics and the public sphere. The study suggests that due to the inherent publicness, connective nature and political smearing-applicability of controversial online action, the mobilization of online resources forces traditional organizations to use considerable communicative resources to compensate for the loss of centralized control over communicating party identity.