NATO Secretary General Mark Rutte will meet with U.S. President Donald Trump next week, setting up a potentially heated dialogue after Trump’s frequent attacks on NATO allies’ lukewarm support for the war in Iran.

Rutte will travel to Washington to meet with Trump on Wednesday, Rutte’s office announced in a social media post. He’ll also meet with Secretary of State Marco Rubio and Defense Secretary Pete Hegseth.

The meeting will come days after Trump said the idea of pulling the U.S. out of NATO was “beyond reconsideration,” threatening to blow up a key military alliance.

“I was never swayed by NATO. I always knew they were a paper tiger,” he told The Telegraph an interview published Wednesday.

Since the beginning of the war in Iran, Trump has lashed out at NATO and European allies for withholding support for the U.S.-Israeli joint military operation. He has become particularly incensed by traditional U.S. allies not stepping in to assist with the Strait of Hormuz, the critical waterway that Iran has effectively shut down since the start of the war through which a significant portion of the world’s oil travels.

But Trump’s suggestion that the U.S. could leave NATO caused some heightened concern among member nations. Finnish President Alexander Stubb called Trump on Wednesday after the interview published to have a “constructive discussion” about NATO.

Trump did not directly attack the Atlantic-spanning alliance in his prime-time address earlier this week but told POLITICO in an interview immediately afterward that he was disappointed in the organization.

“I don’t have any thoughts on NATO. I’m disappointed in them,” Trump said. “I have no frustration. I couldn’t care less. I didn’t need them. But if I ever did need them, they wouldn’t be there. And we had a lot of money every year in NATO, so I learned a lot. … So did America.”

Officials on both sides of the Atlantic have said the administration has not made preparations to leave NATO, which the U.S. helped found in 1949.

Rutte has been a steadfast supporter of Trump despite the president’s attacks on NATO. In an interview with CBS News in March, Rutte praised Trump’s efforts to “make the whole world safe” and signaled he believed that Europe would “come together” behind the president’s plans in Iran.

But as he navigated the U.S.-NATO relationship through Trump’s threat to annex Greenland and his willingness to negotiate on Russian President Vladimir Putin’s terms over the end to the war in Ukraine, NATO allies have bristled at Rutte for appearing too cozy with Trump.