NATO Secretary General Mark Rutte has called on European members of the alliance to increase defense spending, warning that current commitments may not be enough as the bloc faces pressure from U.S. President Donald Trump.

Rutte’s comments come ahead of the alliance’s upcoming summit, where spending targets are expected to be a major point of discussion. The push reflects long-running tensions inside NATO over how much of the burden should fall on European governments versus Washington.

Trump has repeatedly criticized NATO allies for not spending enough on defense and has used the issue to press for faster increases. His stance has added urgency to the debate as European capitals reassess military budgets amid broader security concerns.

The spending dispute is likely to remain central at the summit, with allies weighing how to balance fiscal constraints at home against demands for stronger collective deterrence.