Donald Trump says the war with Iran will continue until all his goals are achieved and he’s warned more US troops are likely to die. But if one of the aims is regime change in Iran, can the US president achieve that without troops on the ground?  The war is escalating in the region with Israel beginning strikes on the Iran-linked militant group Hezbollah in Lebanon’s capital Beirut, after it launched missiles towards Israel.  Today, Hussein Ibish from the Arab Gulf States Institute on why the war is unlikely to go as Trump planned and the nightmare scenarios.  Featured:  Hussein Ibish, senior resident scholar at the Arab Gulf States Institute