NATO leaders gather Tuesday for what could be a historic summit, or one marred by divisions

U.S. President Donald Trump and his NATO counterparts are due to gather Tuesday for a summit that could unite the world’s biggest security organization around a new defense spending pledge or widen divisions among the 32 allies.
Just a week ago, things had seemed rosy. NATO Secretary-General Mark Rutte was optimistic the European members and Canada would commit to invest at least as much of their economic growth on defense as the United States does for the first time.
Then Spain rejected the new NATO target for each country to spend 5% of its gross domestic product on defense needs, calling it “unreasonable.” Trump also insists on that figure. The alliance operates on a consensus that requires the backing of all 32 members.
The following day, Trump said the U.S. should not have to respect the goal.
“I don’t think we should, but I think they should,” he said. Trump lashed out at Prime Minister Pedro Sánchez’s government, saying: “NATO is going to have to deal with Spain. Spain’s been a very low payer.” He also criticized Canada as “a low payer.”
Spain was the lowest spender in the alliance last year, directing less than 2% of its GDP on defense expenditure, while Canada was spending 1.45%, according to NATO figures.
Then Trump ordered the bombing of nuclear installations in Iran. In 2003, the U.S.-led war on Iraq deeply divided NATO, as France and Germany led opposition to the attack, while Britain and Spain joined the coalition.
European allies and Canada also want Ukraine to be at the top of the summit agenda, but they are wary that Trump might not want President Volodymyr Zelenskyy to steal the limelight.
A short summit, decades of mutual security
The two-day summit in The Hague involves an informal dinner Tuesday and one working session Wednesday morning. A very short summit statement has been drafted to ensure the meeting is not derailed by fights over details and wording.
Indeed, much about this NATO summit is brief, even though ripples could be felt for years.
Founded in 1949, the North Atlantic Treaty Organization was formed by 12 nations to counter the threat to security in Europe posed by the Soviet Union during the Cold War, notably via a strong U.S. presence on the continent.
Dealing with Moscow is in its DNA. Keeping the peace outside the Euro-Atlantic area is not.
NATO’s ranks have grown to 32 countries since the Washington Treaty was signed 75 years ago. Sweden joined last year, worried by an increasingly aggressive Russia.
