Maliki needs the good will of Sadr, so the US must back off. Time for the US to come home. They couldn't possibly expect to get anything from Sadr City with a blockade anyway.
washingtonpost.com
The United States on Tuesday disbanded a five-day-old military blockade of Baghdad's impoverished Sadr City section, meeting a deadline set by Iraqi Prime Minister Nouri al-Maliki under pressure from the anti-U.S. cleric whose militia controls the sprawling Shiite slum. Maliki ordered that the security cordon be lifted hours after cleric Moqtada al-Sadr called for a civil disobedience campaign in Sadr City to protest the blockade, which the U.S. launched Wednesday in an effort to find an abducted U.S. soldier and capture a purported Iraqi death squad leader.