Military strikes in Yemen and sanctions targeting the Iran-backed militia have compounded a humanitarian crisis in the poorest country in the Middle East, officials say.
A building in Sana, Yemen, damaged by U.S. airstrikes in April. Aid agencies say that the bombing campaigns have caused more harm to civilians than the Houthis.
Donald Trump will either have to accept a nuclear deal with Iran that looks a lot like the one he denounced, or use military force, with hugely unpredictable consequences.