In the 2006 general election, the Social Democratic Party received the smallest share of votes (34.99 %) ever in a general election with universal suffrage, resulting in the loss of office to the opposition, the centre-right coalition Alliance for Sweden.

The Youth League was established in 1917 after the former Youth League, the Social Democratic Youth (SDUF), in the party split and formed the Swedish Social Democratic Left. In the 2006 general election, the Social Democratic Party received the smallest share of votes (34.99%) ever in a general election with universal suffrage, resulting in the loss of office to the opposition, the centre-right coalition Alliance for Sweden. SD has been winning voters from both the right and the left sides of the political spectrum, and particularly from Sweden's two largest parties, the Social Democratic Party (S) and the Conservative Party (Moderaterna, M) (Oscarsson 2016). That division was between the left and right factions that the social democracy across Europe went through. (They changed their name around 1990 or so — wonder why.) — Eric Kleefeld (@EricKleefeld) February 18, 2020
The results here come amid a string of electoral losses for social-democratic parties across Europe. The lacklustre Social-Democratic prime minister, Stefan Löfven, has presided over the most sustained economic growth in Sweden since the crisis of the 1990s with employment at record-high levels. The Left/Communists have worked with the Social Democrats in minority parliaments, but never included in cabinet. Both the left-leaning bloc led by the Social Democrats and the centre-right bloc in which the Moderates is largest of four parties have said they would refuse to … Even as inequality is growing, those deserting the Social Democrats for the far-right are no “left behinds”. Some more context: The “Left Party” he talks about in there is the old Communist Party back home in Sweden. In legislative elections held over the past two years, the French Socialist Party, German Social Democratic Party and Dutch Labor Party – three other major left-of-center parties – recorded their worst-ever results in the postwar era. Sweden’s Social Democratic Party is not an anomaly.