The Guardian view on Trump's vacillating approach to Iran: a ceasefire is welcome, but the danger isn't over

Donald Trump declared a ceasefire that would last "for ever". Or perhaps not. Within hours, he had attacked both Israel and Iran for breaking the deal he took credit for, though there seemed to be a precarious peace. But the volatility of events owes much to the unpredictability of Mr Trump's own rhetoric and actions. The Middle East crisis will continue to overshadow the Nato summit in The Hague, intended to shore up support for Ukraine. It is just over two weeks since Mr Trump told Israel's prime minister not to bomb Iran's nuclear facilities, hoping for a deal with…