Just as Donald Trump was supposed to rain more fire and fury down on Iran by destroying its bridges and power plants, killing its civilians, and – though it seems immaterial to him – thus explicitly committing war crimes, the president has done another “Taco”. He has proved, once again, the value of the conventional wisdom that he always chickens out.
For an unpredictable man, the pattern of behaviour first identified by Wall Street investors has proved a reliable enough guide in the context of US foreign policy. This is a strategic weakness for the United States, because its enemies – in this case Iran – are able to exploit it.