A former mayor of the Iraqi town Afar who now works in the US for the National Defense University has written a report in which he warns that Iraq may be drifting towards civil war. In each region the military and the policy are staffed by the party that is there in power. In his opinion Iraq should do much more to mix those people and to develop a trulely national army and police.
I don't know enough about Iraq to evaluate if he is right. But he is certainly a man to be taken seriously.
The report can be found here.