President Donald Trump wants a tidy end to the war between Israel and Iran. He demands that the two countries honor a ceasefire and stop fighting. If the truce holds, it could help vindicate his decision to insert the United States into the conflict by bombing Iranian nuclear facilities. However, it's far from clear that the rest of the world will follow the script that Trump has laid out. There are lingering questions about how much of Iran’s nuclear program survived. In addition, the country’s theocratic leadership could retrench, jeopardizing the potential for durable diplomatic solutions to conflicts that have percolated for decades in the region.