Donald Trump has never been subtle about the historical lens through which he views conflict. Invoking Pearl Harbor—even jokingly—to defend the logic of surprise attacks, while echoing the defiant, victory-or-nothing rhetoric associated with Winston Churchill, he has repeatedly framed today’s crises in the language of World War II. That instinct has spilled into his criticism of allies. Trump said he was "disappointed with Keir [Starmer]" over the British prime minister’s initial refusal to send aircraft carriers to the Middle East, adding: "Unfortunately Keir is no Winston Churchill." On Friday he said America's Nato allies were "cowards" for refusing to help...