Sweden's national election was too close to call early Monday, with preliminary results giving the left-wing opposition a razor-thin one-seat advantage over Prime Minister Ulf Kristersson's right wing coalition and days of uncertainty until the final ballots are counted.

Ahead of Sweden’s parliamentary election on Sept. 13, polls show a steady lead for the center-left opposition led by Magdalena Andersson — a rare precedent in…

The results could see either the centre left take back power or the far-right enter government for the first time.