Jordan's ban on the Muslim Brotherhood is unlikely to cause broader political unrest as long as the group's political wing remains intact, but Iranian support for the Muslim Brotherhood's militant factions and worsening economic grievances will maintain the threat of social unrest and militancy. Just over a month has passed since Jordanian security forces announced on April 15 that they had arrested 16 individuals linked to the Muslim Brotherhood after thwarting a plot by the organization to attack various domestic targets. A week later, Jordan banned the Muslim Brotherhood, seized the group's assets and prohibited individuals from promoting its political Islamist ideology. Since then, however, Jordan's crackdown on the Muslim Brotherhood has largely spared the Islamic Action Front, or IAF, which is the political wing of the Muslim Brotherhood and has the largest number of seats in Jordan's National Assembly. Against this backdrop and amid U.S. concerns about instability in...