On September 16th, the Americans vetoed a UN Security Council resolution to this effect, because it did not explicitly condemn Palestinian terrorist groups.
The secretary's office also instructed senior officials to plan how to manage their funds given the continuing budget resolution then in effect and the looming budget sequester scheduled for 2013.
More immediately worrying is the cumulative, potentially ham-stringing effect of the various accommodations reached over the past two months in the negotiation of Resolution 1441 itself.