Foreign Policy: Sadr — feared by some, reviled by others and revered by a broad swath of Iraq’s urban poor — is now a kingmaker in Iraqi politics. It’s a role that Sadr, the scion of a prominent clerical family, has been building toward since 2003. Immediately after the U.S. invasion, thousands of his supporters packed the dusty streets of Baghdad’s Saddam City neighborhood (later renamed Sadr City) for Friday prayers week after week. Sadr rallied their ranks around his parliamentary list in the 2005 elections, making a strong showing, and then used his political clout to help push Nouri al-Maliki into the prime minister slot in 2006. But the friendship didn’t last: Sadr bitterly split from Maliki when the latter allowed American troops to attack his militia members. Depending on whom you ask, Sadr either sensed he was next to be targeted and fled to Iran or was convinced of that fact by Iranian officials, who urged Sadr to leave for his own safety. Now, as U.S. troops withdraw and negotiations are underway in Baghdad to form a new government, Sadr may be planning his return. If he does, he will no doubt face jubilant crowds once again.