Some amplification about Chalabi from a former CIA official.
"First and foremost," this guys says, Chalabi wanted "not just to destroy the secular Sunnis, but "especially the secular Shia. That is the reason for the ferocious attack on the Army and the Baath. Demographics would have taken care of the Sunnis, they were only 20 percent of the population, but the Shia were historically secular in Iraq and the majority. The Shia were the backbone of the old Communist party and when the Soviet empire fell, many went to the Baath and many made the only other political move feasible and joint the Iranian-backed religions parties."
"The Baath were the majority Shia and the Baath was the biggest threat to SCIRI and the Da’wa because all of Irq’s capable technocrats like Thamir Ghadban, the first Oil Minister, were in the Baath."
"After Op Iraqi Freedom, the initial idea was to form a transitional government perhaps under Gen. Sultan Hashem which would be made up of respected Kurdish, Shia and Sunni elements.which could gjide the country for six months or more until elections could be held. The ide was at a later date, truth and reconciliation process could take over after Iraq was out of transition. The neocons, supporting Chalabi, never would accept elements from the old regime providing the bridge to the future because it would cut out Chalabi and external exiles."
"Clearly the entire idea was vetoed by principals in the Pentagon. The USG was never looking at Hashemi, the agency was. It was an attempt to preempt the Chalabi claque. Chalabi certainly suspected something was up and had a direct line into Wolfowitz’s office.
"There is no doubt of Chalabi’s long term connection with Iran and his having been their agent for years, but, in fairness, not everyone there believed he worked for Iran. Many simply considered him power mad. But I think that the idea that Chalabi was perhaps an Iranian plant from the beginning was more than some people could contemplate."
In any case, Vince Cannistaro has had no doubts: "Chalabi was working for Iran, and Iran took us to breakfast, lunch and dinner."
Hope this helps.