Iraqis chant pro-government slogans and wave flags in a show of support for embattled Prime Minister Nouri al-Maliki during a demonstration in Baghdad Monday. Maliki says he will file a legal complaint against the country's newly elected president. Hadi Mizban/AP hide caption

itoggle caption Hadi Mizban/AP

Iraqis who have fled as the Sunni extremist group ISIS has spread in northern Iraq enter a camp for displaced people between the Iraqi city of Mosul and the Kurdish city of Irbil on Thursday. Iraq's leader says he welcomes Syria's attacks on ISIS. Hussein Malla/AP hide caption

itoggle caption Hussein Malla/AP

Iraqi Shiites perform the Friday prayer in the shrine city of Karbala in central Iraq. Iraq's top Shiite cleric, Grand Ayatollah Ali al-Sistani, called for the country's next government to be "effective" and avoid past mistakes, in an implicit criticism of Prime Minister Nouri al-Maliki. Mohammed Sawaf/AFP/Getty Images hide caption

itoggle caption Mohammed Sawaf/AFP/Getty Images

Iraqi Prime Minister Nouri al-Maliki is welcomed by Vice President Biden in Washington on Wednesday. Maliki is asking for U.S. military hardware to fight radical groups behind a recent surge in violence in Iraq. Cliff Owen/AP hide caption

itoggle caption Cliff Owen/AP