The 2000s and 2010s saw the Social Democratic party's further loss of influence, though it would return to government in 2014 under Stefan Löfven. The 2010s were politically turbulent; the European migration crisis saw the rapid rise of the right-wing populist Sweden Democrats, who would eventually become the balancing power between the two main blocs of left and right which had long been the dominant dynamic within Swedish politics. Opposition toward the Sweden Democrats from the traditional political parties caused lengthy government formation processes, especially following the 2018 general election.