Europe has spent the Trump years learning what it is to deal with an ally that cannot be relied on to stay one. Tariffs used as leverage, financial pressure deployed against friends as readily as rivals, a transatlantic relationship that resets with every news cycle. What Brussels wanted, quietly, was a partner with real weight who would not do any of that. On September 17, in the European parliament, it got a name to put to the wish list: Canadian prime minister (PM) Mark Carney. Commission President Ursula von der Leyen had floated something the EU has never offered anyone…