Bremer -- fronting of course for Bush, Cheney, and the Pentagon neo-cons -- is trying to upend Sistani as well as 'democracy' and the vote. They are also of course trying to use the U.N. again to justify their intransigence.
Sistani has managed to get the 'caucus' plan terminated. Now he has indicated he wants assurances from the U.N. that there will be a democratic vote no later than October, and no more delays. Fearing that the Americans are now pushing the election they don't really want but cannot directly oppose off until way into 2005 at least; and they will push it further and further if they can. The last thing the Bushies want in 2004 is a vote in Iraq before the American election in November. And then the last thing they really want is real democracy in Iraq; for after all the next step once 'sovereignty is restored' would be to tell the American troops to leave. And the U.S. has no intention of either troops or CIA leaving Iraq anytime soon.