US President Donald Trump says German Chancellor Friedrich Merz does not know what he is talking about regarding Iran, a day after Merz sharply rebuked the US over its handling of the conflict, Reuters reports.

“The Chancellor of Germany, Friedrich Merz, thinks it’s OK for Iran to have a nuclear weapon. He doesn’t know what he’s talking about!” Trump writes on Truth Social.

Trump claims that if Iran did possess a nuclear weapon, “The whole world would be held hostage.

“I am doing something with Iran, right now, that other nations, or presidents, should have done long ago,” he adds. “No wonder Germany is doing so poorly, both economically and otherwise!”