It would be the biggest divorce in history. For eight decades, Nato has weathered internal disputes, enemy plots and shooting wars in Bosnia, Kosovo and Afghanistan.
But if Donald Trump acts on his threat to finally leave, having told The Telegraph he is strongly considering pulling out after allies failed to join his war on Iran, the transatlantic family will be torn asunder. At which point, the club that calls itself the most successful alliance in history may as well close its doors. And the pain could match that of the most acrimonious breakups.
