BAGHDAD — Prime Minister Nouri al-Maliki will not readily surrender power and is unlikely to do so unless chief ally Iran insists that he go, Maliki’s foes and supporters are warning as pressure mounts on the embattled Iraqi leader to make concessions to rivals or step aside.
The pressure intensified Friday with an appeal by Iraq’s most revered Shi’ite cleric for the swift formation of a new government capable of uniting Iraqis against the threat posed by Sunni militants who have seized large chunks of Iraqi territory over the past 10 days.
Grand Ayatollah Ali Sistani did not directly mention Maliki, but he called for the creation of a government that has ‘‘broad national support,’’ a clear reference to Maliki’s failure to win the confidence of the country’s Sunnis during his eight years in office. The message was delivered by his representative Ahmed al-Safi in the holy city of Karbala.
Sistani’s message echoed one delivered by President Obama on Thursday that hinted at a withdrawal of US support for Maliki, whose authoritarian style and discriminatory behavior toward Iraq’s Sunni minority are widely blamed for the bloodshed threatening to tear the country apart.
‘‘Only leaders that can govern with an inclusive agenda are going to be able to truly bring the Iraqi people together and help them through this crisis,’’ Obama said while announcing the dispatch of as many as 300 US troops to assist Maliki’s forces in their battle against the Islamic State of Iraq and Syria extremist group.
Persuading Maliki to step down could be difficult, say his political foes, who have long sought to persuade the United States that Maliki is a liability but have repeatedly failed to form a viable coalition against him.
‘‘This is not going to be easy,’’ said Deputy Prime Minister Saleh al-Mutlak, a Sunni who has led many fruitless efforts to build parliamentary coalitions against Maliki in the past. ‘‘Maliki will not go quietly.’’
Previous bids to oust Maliki through constitutional means have foundered on the inability of his foes to unite around an alternative candidate. According to the parliamentary system of government spelled out in Iraq’s constitution, drawn up under US supervision in 2005, whoever commands a majority of seats in the Parliament forms the government, making it theoretically possible to replace any leader by mustering the support of enough lawmakers.
A bigger obstacle to forcing Maliki’s departure, however, could be the support of Iran, which has shown no sign that it is preparing to dilute its backing for the prime minister. The support includes funding and training for the private militias that back Maliki, many of whose members have taken to the streets in recent days in response to a call to arms.
‘‘The only outside power that could get rid of Maliki is Iran,’’ said Kenneth Pollack of the Washington-based Brookings Institution. ‘‘And even if the Iranians decided they wanted him out, I am not sure they could do it. Maliki has the loyalties of the security forces and the loyalty of the militias, and it is going to be extremely hard to get rid of him.’’
The question of replacing Maliki is timely because his second four-year term has expired. Elections in April produced a new Parliament, and the constitution says a new government must be formed with the support of a majority of the 328 new lawmakers.
The question is one of growing urgency because there is a constitutional vacuum in the country. Within days of the Islamic State’s seizure of the northern city of Mosul, the current Parliament’s mandate expired. Until the new one meets, Maliki is effectively governing unchecked by any law or oversight, and that is raising concerns about a continued concentration of power.
In an example of how he can use the vacuum to increase his hold on power, Maliki announced salaries Thursday for the mostly Shi’ite volunteers who have flocked to private militias in recent days, responding to a call from Sistani to confront Islamic State militants.
Sistani, a moderate who is regarded as the world’s most influential Shi’ite figure, expressed remorse in his Friday address for earlier remarks seen as inspiring the rush to arms by Shi’ites.
The appeal ‘‘was not only about one sect,’’ he said.