AHMED CHALABI, IRAQI NATIONAL CONGRESS
As the leader of the US-backed Iraqi National Congress (INC), Mr Chalabi has become an important and vocal member of the Iraqi Governing Council.
He was the second member of the Governing Council to hold its rotating presidency, and was also among a delegation which attended a United Nations Security Council meeting on the future of Iraq in July 2003.
During Saddam Hussein's rule, the INC was a fractious opposition group of Iraqi exiles. It has received funding from the US for much of the period since the 1991 Gulf War.
Mr Chalabi, a British-educated former banker, has the support of Washington hawks and the Department of Defense, and was moved into Iraq in March 2003 by the US military. The US State Department is thought to be distrustful of him, however, and to favour Adnan Pachachi.
Mr Chalabi's critics accuse him of corrupt business dealings (for which he has been indicted in Jordan) and point out that he has little backing inside Iraq, which he left in the 1950s. Analysts say that as a Shia, even a secular Shia, he arouses the mistrust of the former Sunni ruling class of Iraq.
Mr Chalabi has assiduously courted Sunni and Shia tribal leaders. He is backed by a small American-funded army called the Free Iraqi Forces. Its members have been seen on join patrols with US forces in central Iraq.