STOCKHOLM – Sweden faces weeks of political uncertainty after the country's two rival blocs failed to win a ruling majority in the elections that spurred a far-right party against growing discontent with large-scale immigration.

With most ballots counted, the ruling center-left bloc has a more than 40% lead over the center-right Alliance.

The Swedish Democrats, an anti-immigrant party from a neo-Nazi movement, won Sunday about 18% of the vote, against 13% four years earlier.

The party, which has struggled to moderate its image in recent years, has achieved satisfactory results in the face of the difficulty of integrating hundreds of thousands of immigrants who have arrived in the Scandinavian nation in recent years.

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