MADRID: Spain has rejected a NATO proposal to spend 5 percent of gross domestic product on defense needs that’s due to be announced next week, calling it “unreasonable.”

Prime Minister Pedro Sánchez, in a letter sent on Thursday to NATO Secretary-General Mark Rutte, said that Spain “cannot commit to a specific spending target in terms of GDP” at next week’s NATO summit in The Hague, Netherlands.

Any agreement to adopt a new spending guideline must be made with the consensus of all 32 NATO member states. So Sánchez’s decision risks derailing next week’s summit, which US President Donald Trump is due to attend, and creating a last-minute shakeup that could have lingering repercussions.

Most US allies in NATO are on track to endorse Trump’s demand that they invest 5 percent of GDP on their defense and military needs. In early June, Sweden and the Netherlands said that they aim to meet the new target.

A NATO official on Thursday said that discussions between allies were ongoing about a new defense spending plan.