Trump Tells Germany’s Merz to Stop “Interfering” on Iran as Tensions With Berlin Escalate

US President Donald Trump has sharply rebuked German Chancellor Friedrich Merz, telling him to stop “interfering” in the conflict with Iran and to spend more time trying to end the war in Ukraine.

The attack marks another escalation in a growing public dispute between Washington and Berlin over the US-Israel war against Iran. It also comes one day after Trump said his administration was reviewing a possible reduction of US troops stationed in Germany.

In a social media post, Trump said Merz should focus on “ending the war with Russia/Ukraine” and fixing what he called Germany’s domestic problems, especially immigration and energy. He accused the German leader of spending too much time criticizing those trying to eliminate what Trump described as the Iranian nuclear threat.

The latest criticism appears to have been triggered by Merz’s comments earlier this week, when the German chancellor said the United States was being “humiliated” by Iran during negotiations to end the war. Merz suggested that Tehran was outmaneuvering Washington at the negotiating table.

A dispute between allies is becoming public

The clash is significant because Germany is one of Washington’s most important NATO allies and hosts major US military facilities, including Ramstein Air Base, US European Command, US Africa Command and Landstuhl Regional Medical Center.

Trump’s threat to review the US military presence in Germany turns a diplomatic disagreement into a wider strategic issue. The United States has tens of thousands of troops in Germany, and any reduction would affect NATO planning, European security and transatlantic relations. Euronews reported that Trump said Washington was studying a possible troop reduction, with a decision expected after a review.

The message from Washington is clear: Trump does not want European criticism of his Iran policy while the US is trying to pressure Tehran militarily and economically.

For Berlin, the problem is different. Germany wants to remain aligned with the US on security, but Merz’s comments show concern that Washington’s strategy toward Iran may be failing or becoming too costly.

Iran has become a test of US-European unity

The dispute exposes a deeper issue inside the Western alliance.

Trump’s administration sees the Iran campaign as necessary to remove a nuclear threat and restore US credibility. Trump has framed the pressure on Tehran as something that makes the world, including Germany, safer.

Merz appears more skeptical of Washington’s handling of the war and negotiations. His “humiliated” comment suggested that Iran has been able to delay, resist or exploit the diplomatic process while the US carries the political and military costs.

That disagreement matters because the Iran war is no longer only a Middle East conflict. It is affecting oil markets, NATO politics, US domestic debate and Europe’s security calculations.

If European leaders openly criticize Trump’s Iran strategy, the White House may interpret it as a lack of support during wartime. If they remain silent, they risk appearing to endorse a war they may not fully control or support.

Germany is also caught between Ukraine and Iran

Trump’s reference to Ukraine was not random.

The US president has repeatedly pressured European allies to take more responsibility for European security. By telling Merz to focus on Ukraine, Trump is linking Berlin’s criticism of Iran policy to Germany’s performance on its own continent.

This is politically useful for Trump. It allows him to argue that Germany should not lecture Washington on Iran while Europe still depends heavily on US power for NATO security and support against Russia.

For Merz, the challenge is more complicated. Germany must manage the war in Ukraine, rising defence expectations, domestic pressure over immigration and energy, and now a widening US-Iran confrontation.

Trump’s comments are designed to put Berlin on the defensive.

Why the troop threat matters

The possibility of reducing US troops in Germany gives Trump’s criticism more weight.

Germany is not just another ally. It is a central hub for US military operations in Europe, Africa and the Middle East. A reduction of forces would be more than symbolism; it could affect logistics, deterrence and America’s ability to project power from Europe.

But the threat also fits Trump’s broader style of alliance politics. He often uses security commitments as leverage, especially when he believes allies are not contributing enough or are criticizing US policy.

That makes the dispute with Merz dangerous for Berlin. It is not only about one comment on Iran. It could become part of a broader reassessment of Germany’s role in US strategy.

The bigger picture

The public clash between Trump and Merz shows how the Iran war is straining alliances beyond the Middle East.

Washington wants support, or at least silence, from European partners. Berlin wants room to question whether the US approach is working. Trump is responding by turning the disagreement into a test of loyalty.

The result is a widening diplomatic rift at a sensitive moment.

Iran remains under pressure. The US is defending its strategy. Israel continues military operations. Europe is watching the conflict’s economic and security fallout. And Germany, once seen as one of Washington’s most stable European partners, is now facing direct public criticism from the US president.

The core question is whether this remains a war-of-words between two leaders or becomes something larger: a shift in the US-Germany security relationship at a time when Europe is already under pressure from Ukraine, energy insecurity and rising defence demands.

For now, Trump’s message to Merz is blunt: stop criticizing Washington’s Iran policy — and fix Europe’s problems first.