Donald Trump is losing control of American foreign policy

Iran and the US have stood at a crossroads in recent weeks. Down one path lay negotiations that, while difficult, promised benefits to the citizens of both countries. Down the other path, a protracted war that promised little more than destruction. Back in 2018, Donald Trump had blocked the diplomatic path by tearing up the existing nuclear agreement with Iran - the Joint Comprehensive Plan of Action. But since beginning his second term in January he has been surprisingly open to negotiations with Tehran. Iran's supreme leader, Ayatollah Ali Khamenei, seemed ready to go along. But the Israeli prime minister,…