The turf war in the Iraqi Shi'ite regions has several templates. Iraq's future as a unitary state; the parameters of acceptable federalism, if any; attitude towards the US; control of oil wealth; overvaulting political ambitions - all these are intertwined features of a complex matrix.

Tehran would be gratified that in any case it has made the point that it possesses awesome influence within Iraq. Anyone who knows today's anarchic Iraq would realize that triggering a new spiral of violence in that country may not require much ingenuity, muscle power or political clout.

to be able to summarily cry halt to cascading violence, and to achieve that precisely in about 48 hours, well, that's an altogether impressive capability in political terms. In this case, the Iranians have managed it with felicitous ease, as if they were just turning off a well-lubricated tap.

Cheney must be furious that Tehran torpedoed the entire US strategy for Big Oil.