Interesting, I didn't think the US trusted people like Chalabi to that degree. Since watching Game of Thrones it's looked to me like it was a personal feud between two oligarchical families that had a falling out.
He'd been working on it for decades in exile trying to convince the US to back rebellions in Iraq then trying to get the US to depose Saddam itself. Of course there's rarely a single reason anything involving a whole government decides to do something but I think it'd be ridiculous to not say Chalabi was one of the big factors leading to the US invasion of Iraq. Another potential is the fact that the Bush family might have felt like they had unfinished work there from the first invasion where the US stopped short of deposing Saddam over Kuwait.
