With two weeks to go to the election, opinion polls suggest the anti-immigration Sweden Democrats (SD) could sweep around 20 percent of votes, making them the second- or third-biggest party.
That could give SD -- an offshoot of the neo-Nazi movement but now clamouring for political legitimacy -- significant influence over Swedish politics.
SD has said it is willing to collaborate with either the left or right, as long as it can shape the country's immigration policy.
However, it will have a hard time wielding any newfound clout. While some parties on the right-wing have occasionally appeared tempted to court the SD for informal support to pass legislation in parliament, none of them seems ready to forge a more formal collaboration with a party still seen as pariahs by a large majority of Swedes.
The far-right first entered parliament in 2010, garnering 5.7 percent of votes cast. Four years later, they more than doubled their score, taking 12.9 percent of votes and 42 of the 349 seats in the 2014 election.