Battles continued to rage Sunday between the radical cleric's Mahdi Army and Iraqi and US forces.
Troop levels could settle at 'presurge' levels of 140,000.
Moqtada al-Sadr's Mahdi Army fought US, Iraqi forces in Baghdad and Basra on Tuesday.
Despite their rhetoric, '08 candidates try to keep their options open.
Broad outspokenness, and not a White House plan for war with Iran, most likely led to his retirement from Central Command.
Adm. William Fallon stepped down after an article in Esquire magazine portrayed his views on Iran as being at odds with those of President Bush.
The president is likely to veto a bill outlawing such harsh interrogation methods, but the debate goes on.
The US implements a program to release those not deemed a threat.
In agreeing to stop the post-'surge' drawdown in Iraq, Defense secretary keeps pressure on the service.
Deployment of 3,200 marines will help, analysts say, but will not provide the kind of counterinsurgency now needed there.