Trump says German chancellor 'doesn't know what he's talking about' after Merz said Iran was 'humiliating' the US The US president, who is meant to be busy hosting King Charles and Queen Camilla at the White House during their state visit, has found time in his schedule to lash out at the German chancellor, Friedrich Merz , whom he said “doesn’t know what he’s talking about” regarding Iran . In a post on Truth Social moments ago, Donald Trump wrote: double quotation mark 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! If Iran had 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. No wonder Germany is doing so poorly, both Economically, and otherwise!…