Clearing a Final Hurdle, Dutch Leader Is Poised to Become NATO Chief

Mark Rutte, the departing prime minister of the Netherlands who has guided more than $3 billion in Dutch military support to Ukraine since 2022, on Thursday clinched the last assurance he needed to become NATO’s next secretary general.

On Thursday, President Klaus Iohannis of Romania dropped his bid to lead NATO, making it all but certain that Mr. Rutte, 57, would be formally elected to a four-year term at the helm of the Atlantic alliance.

That could take place as soon as next week, ahead of a high-level NATO summit in Washington in July. The Netherlands is a founding member, and Mr. Rutte would be the fourth Dutch official to become the organization’s top diplomat.

Even if that happens, he would not immediately assume responsibility for the 32-nation alliance. Mr. Rutte, who has been the leader of the Netherlands since 2010, remains prime minister in the country’s transitional government, and a diplomat who requested anonymity in line with protocol, said the current NATO secretary general, Jens Stoltenberg, was for now expected to stay until his term ends in October.

Mr. Rutte has increasingly echoed a main NATO message that supporting Ukraine in its defensive war against Russia is vital for preserving democracy and national sovereignty across the alliance.

“This war is not simply about defending the freedom of the Ukrainian people; it is also about protecting the freedom and security of the Netherlands,” Mr. Rutte is quoted as saying at the top of his government’s website. “So we will not abandon those most in need.”