A familiar transatlantic argument flared again on July 3, as Germany's chancellor, Friedrich Merz, responded to criticism from President Trump over how much European members of NATO spend on their armed forces. Trump had described the allies' spending as "ridiculous" and "one-sided," singling out Germany as having spent far less than the United States over the past decade; Merz answered by pointing to what he called an unprecedented German push to rearm, Al Jazeera reported.
What Merz said
Speaking in Berlin after talks with Baltic leaders, Merz cast Germany's current effort as historic. "This is the greatest effort we have ever made to strengthen our defence capabilities," he said, according to Al Jazeera. He added that Germany would double its defense budget within four years and would reach a new NATO benchmark of 3.5 percent of economic output on core defense as early as 2029 — well ahead of the alliance's agreed timeline.
The comments were a direct, if measured, rebuttal: an acknowledgment that Europe had underspent in the past, paired with an insistence that this is changing quickly, and that Germany in particular is now moving faster than required.
The spending target at issue
Behind the dispute is a shift in what NATO expects of its members. For years the alliance's guideline was that members should spend at least 2 percent of gross domestic product on defense — a figure many, including Germany, long failed to meet. More recently, NATO agreed a substantially higher goal: 3.5 percent of GDP on core military spending, to be reached by 2035, part of a broader response to the war in Ukraine and to pressure, much of it from Washington, for Europe to shoulder more of the burden.
Merz's claim that Germany will reach that 3.5 percent mark by 2029 is therefore a pointed one: it positions Berlin not as a laggard but as an early achiever of the tougher new standard.
The wider friction
The back-and-forth reflects a tension that has run through the alliance for years and sharpened under Mr. Trump, who has repeatedly argued that the United States pays disproportionately for the defense of allies who should do more themselves. His framing — that the arrangement is unfair to American taxpayers — has resonated with parts of the US political spectrum and unsettled European capitals that rely on the American security guarantee.
European leaders, for their part, have largely responded not by rejecting the premise but by accelerating their own spending, while trying to avoid an open rupture with Washington. Several have adopted a conciliatory tone toward Mr. Trump even as they push back on specifics, wary of any weakening of the US commitment to NATO at a moment of heightened threat from Russia.
The timing is notable: the exchange came ahead of a NATO summit, where spending and burden-sharing are again set to dominate. Merz's remarks read partly as a message to that gathering — and to Washington — that Germany is doing its part.
Why it matters
At stake is more than an argument over percentages. NATO's credibility rests on the assumption that its members will invest enough to defend one another, and the question of who pays how much goes to the heart of the alliance's cohesion. Persistent friction between the United States and its largest European economy risks feeding doubts — in Moscow as well as in allied capitals — about the durability of Western unity.
For now, the dispute is rhetorical, and Merz's answer suggests Germany intends to blunt the criticism by outpacing the requirements rather than by picking a fight. But the underlying disagreement — over fairness, over commitment, and over how much Europe can rely on the United States — is unlikely to fade, and will shape the alliance's politics well beyond a single summit.
