Trump goes after German Chancellor over harsh criticism of Iran War
President Donald Trump, Ukrainian President Volodymyr Zelenskiy, German Chancellor Friedrich Merz, French President Emmanuel Macron, British Prime Minister Keir Starmer, Italian Prime Minister Giorgia Meloni, and Finland's President Alexander Stubb, NATO Secretary General Mark Rutte and European Commission President Ursula von der Leyen pose for a photo amid negotiations to end the Russian war in Ukraine, at the White House in Washington, D.C. on Aug. 18, 2025. REUTERS/Alexander Drago

President Donald Trump responded defensively to German Chancellor Friedrich Merz's criticism of the Iran war, accusing Merz of supporting Iranian nuclear weapons development.

Trump claimed Merz "doesn't know what he's talking about" and warned that Iranian nuclear capability would hold "the whole world hostage."

Merz criticized the U.S. campaign Monday, saying America is being "humiliated" by Iran and risks becoming trapped in a prolonged conflict similar to Afghanistan and Iraq. Trump fired back on Truth Social, claiming he is accomplishing what other nations and presidents should have done previously, and criticized Germany's economic performance.

Trump's characterization of Merz's position appears to misrepresent the chancellor's actual argument, which focused on the lack of a clear U.S. strategy and exit plan rather than supporting Iranian nuclear development.

The exchange underscores tensions between the Trump administration and key NATO allies over the controversial Iran conflict.

Watch the video below.