In Sweden, a far-right assault on the media is undermining the Nordic model | Martin Gelin

From troll farms to racist hate speech, nationalists' bullying tactics are having a chilling effect on political journalism

Employees at Sweden's national news channel, TV4, were last month told to avoid wearing clothing or badges that might identify their employer's logo in public. The security risk was deemed too big. The advice was made in response to increased threats against the station and its reporters after its investigative programme, Kalla Fakta (Cold Facts), alleged that the far-right Sweden Democrats - the second biggest party in Sweden - operated a vast network of anonymous social media accounts, coordinating attacks on political opponents and the media.

Sweden is one of the world's strongest democracies, with very high levels of trust in its media and political institutions. But journalists covering domestic politics now have to fear for their safety.