The Illinois senator also said his measure would also call for the gradual redeployment of US troops from the region "within two to four months."
"We've been told that we would be greeted as liberators. We're been promised that the insurgency was in its last throes. We've been assured again and again that we were making progress, and that the Iraqis would soon stand up so we could stand down," Obama said.
"Now, after the loss of more than 3,000 American lives, after spending almost 400 billion dollars, after Iraq has descended into civil war, we have been promised once again that the president's plan to escalate the war in Iraq will this time be well-planned, well-coordinated, and well-supported by the Iraqi government," he said.
"None of this seems to be the case," said Obama, citing news reports that found no clear chain of command between US and Iraqi military leaders on the ground there.