Before his first term as US president began in 2017, Donald Trump was probably best known for his book, The Art of the Deal. But by launching, together with Israel, a widely unpopular war on Iran, Trump has arguably dealt himself a very weak hand. There is little “art” in it. The headline splashed across the front page of the Financial Times on March 17 – “Allies reject Trump’s call for warships” (to force open the Strait of Hormuz, which Iran has partially closed after US and Israeli attacks) –...