Three days after his announcement, al-Sadr criticized al-Maliki, imploring his fellow Iraqis to replace "dishonest" officials with "noble" ones in the upcoming elections. He also urged the "honest" politicians to maintain their independence from al-Maliki. These statements belie al-Sadr's self-professed retirement because they are meant to undermine al-Maliki's government.

Al-Sadr has always been adept at capitalizing on the controversy he creates. Having spent nearly 11 years in politics, his career has been characterized by dramatic maneuvering designed to maintain his position in the Shia community and thus Iraqi and international politics. This is the only strategy he has against his more experienced and tenured rivals. 

Evidence of his strategy abounds. His movement waged an insurgency against U.S. forces in 2004 only to join the U.S.-built political system the next year. Later he cooperated with U.S. authorities against rogue elements of his movement. He relocated to Iran unexpectedly to resume his religious studies (he has shuttled back and forth ever since). Then in 2008, he led an armed resistance against al-Maliki, who tried to disband his militia, known as the Mehdi Army, which subsequently became a social and political movement. In early 2011, he returned to Iraq, where he spends much of his time trying to weaken al-Maliki.

In a notable example, al-Sadr tried to undermine al-Maliki by taking advantage of the government's problems with the Kurdistan Regional Government and the Sunnis in western Anbar province. He aligned himself with former Prime Minister Iyad Allawi's al-Iraqiya list and the Kurdistan Alliance but was unable to force al-Maliki to surrender some of his power — his interests conflicted with those of the Shia community. Al-Maliki called his bluff of seeking a new parliamentary majority with the Sunnis and Kurds and al-Sadr had no choice but to back down. 

Neither Cleric nor Politician

Moreover, this is not the first time al-Sadr has said he would quit politics — he made a similar announcement in 2013. But the timing of his most recent announcement is notable because general elections in Iraq are only two months away. He knows the elections are an opportunity for his movement to garner more power and prevent the prime minister from winning a third term.

The problem is that al-Sadr cannot radically tilt the balance of power among the Shia in his favor without weakening Shia control of the state. This is especially true now, as the Iraqi Shia and their Iranian allies contend with spillover from the Syrian civil war and adapt to Iran's regional influence. Currently, the Iranians do not want to disrupt the status quo among the Shia, given the risks and the delicate negotiations with the United States, which has created domestic problems within Tehran.

But al-Sadr has contravened the wishes of Iran before. He believes that if he does not take advantage of the upcoming elections, he will have wait another four years to weaken al-Maliki, giving the al-Maliki-led Shia establishment more time to solidify its power.

Further complicating the matter is the political wing of his movement, which is implicated in a corruption scandal. He draws his support from the lower classes of the Shia in the south and in Baghdad and among the Turkmen in the north. Thus he cannot afford to ignore corruption allegations, which are particularly problematic for a movement that was founded as a champion of the downtrodden. By announcing his departure from politics, he can distance himself and his family from the scandal.

But his so-called retirement could benefit him in several other ways. First, it could create an opportunity for him to overhaul his political movement and regain better control over it. Second, it could energize and perhaps expand his base if his supporters overwhelmingly demand his return (as Egyptians did when Gamal Abdel Nasser resigned in 1967). Third, it can help al-Sadr reconcile his political and religious roles. He is neither a traditional politician nor a true cleric, even though his family's influence is built on several prominent ayatollahs. Al-Sadr knows he cannot hope to one day replace al-Maliki as prime minister, so he has never personally run for office. But he also lacks the scholarly credentials to be an ayatollah.

In many ways he is caught between the competing Najaf and Qom models of Shia political Islam. According to the Najaf model, which is led by Grand Ayatollah Ali al-Sistani, clerics do not directly rule. But the Qom model is guided by Velayat-e-Faqih, the doctrine that requires clerics to be involved in governance. Al-Sadr is trying to hybridize these two models.

Reconstituting the Shia Alliance

Ideally, al-Sadr would like to be a cleric who wields political power through proxies. He has been trying to improve his religious credentials accordingly. Reportedly he has been accepted as Hojjat al-Islam, a rank lower than ayatollah, in Iran. And while it will take some time for him to become a bona fide religious scholar in Iraq, the first step in this process is disengaging from politics.

This is why his speech against al-Maliki was so revelatory. It was a very politicized speech for someone who claims to be apolitical. He referred to al-Maliki as a corrupt "tyrant" and called on his supporters to participate in the elections — suggesting that he still relies on his political machine even if he has chosen to close down its formal political wing. (Notably, he has retained the financial, religious and social wings of his movement, which he can use to influence politics.) In addition, he said he would participate in the elections and urged the governors of Baghdad and Maysin provinces, both of whom are affiliated with his movement, to seek re-election. Distancing himself from politicians enables al-Sadr to avoid being held responsible for their wrongdoings yet still retain his role as kingmaker.

As he tries to reconfigure the Shiite political landscape, al-Sadr hopes to force al-Maliki to concede some political power, given that he depends on the al-Sadrites to sustain his parliamentary majority and thus his premiership. At the very least, al-Sadr's move to operate through independents would concern al-Maliki, who has grown accustomed to working with al-Sadr's formal political party.

Al-Maliki will use his position as an incumbent to minimize potential seat losses, but he still needs to negotiate with al-Sadr to sort out the dissenting Shia vote. This is especially true because al-Sadr's decision to engage in politics indirectly has essentially upended the existing institutional framework in the form of the National Alliance, which consists of al-Maliki's coalition and the one led by al-Sadr's movement. Al-Maliki is now forced to reconstitute the Shia alliance, and al-Sadr will demand several things to ensure his movement's support, including a stipulation that al-Maliki cannot serve as prime minister indefinitely. If al-Sadr can improve his bargaining position, he will be more able to demand a redistribution of power among the Shia.

This disarray among the Shia will once again require Iranian mediation at a particularly trying time for Tehran. Al-Sadr can be expected to try to extract concessions from the Iranians as well. His moves are calculated, but he faces several constraints that could limit his ability to enhance his movement's power.