The call today by Grand Ayatollah Ali al-Sistani contained thinly veiled criticism that Shiite Prime Minister Nouri al-Maliki, in office since 2006, was to blame for the nation's crisis over the blitz by the al-Qaida-inspired Islamic State of Iraq and the Levant.
Al-Sistani's message was delivered by his representative Ahmed al-Safi in the holy city of Karbala.
He said the future government "should open new horizons toward a better future for all Iraqis."