Norwegian Prime Minister Jonas Gahr Store is starting talks on Tuesday to form a new Labor government after his election win.

The center-left bloc took 87 seats — a slim majority in the 169-member legislature — with Store stemming 16 years of consecutive decline in Labor support. The tight race electrified voters, with turnout rising to 78.9 percent, the highest level since 1989, according to preliminary data from the Norwegian Directorate of Elections.

Store plans a single-party minority government, putting him on track for four years of political haggling with four smaller peers. He needs their support in parliament to rule after Labor’s prior partner, the Center Party, slumped in Monday’s election. Speaking to reporters in Oslo after the result had become clear, Store said he plans to talk with all four in the next few days and weeks.

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In the opposition, right-wing voters shifted further to the right. The anti-immigrant Progress Party doubled its backing to emerge as the second-biggest party, taking voters from the Conservatives, which had their worst result in two decades.

“We need a majority for a budget, we know we need a majority for our politics and that the majority is to the left,” Store told reporters in Oslo after declaring victory.

He said he would seek agreements with left-leaning parties, but also broader cooperation across the political spectrum on topics like support for Ukraine and defense. He also invited all parties to join Labor in negotiating a tax agreement.

While the result promises a great deal of continuity in western Europe’s biggest oil and gas exporter and one of the world’s richest countries, it also means Store will need to make concessions on policies to gain the backing he needs in parliament. The smaller political groups, ranging from the far-left Red Party to the agrarian Center, recognize their position as kingmakers in letting Store govern Norway.

Among Store’s stated priorities for the government are prudent economic policies, Norway’s status within the North Atlantic Treaty Organization (NATO) and upholding its European Economic Area agreement that allows the nation to access the single market from outside of the European Union (EU). The Center Party, Socialist Left and Red Party balk at any mention of seeking EU membership.

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Another prospective division with Store’s potential partners involves the nation’s $2 trillion sovereign wealth fund, mired in a public uproar over its investments in Israel. While the asset manager has already sold out of dozens of Israeli companies, three parties — the Socialist Left, Greens and Red Party — have demanded the government push the oil fund to sell more investments there, indicating that will be a condition of their support of the cabinet.

The fund also removed Caterpillar Inc due to its links to the conflict in Gaza, provoking ire among allies of President Donald Trump and threatening to worsen Norway’s relationship with the US.

The Greens have traditionally demanded ending any oil exploration in the North Sea, contrary to Store’s Labor, which favors drilling for more oil and gas to slow the decline of the country’s hydrocarbon resource base and ensure energy security. Still, their leader, Arild Hermstad said in an interview on Monday that he plans to cooperate with Store in negotiations.