The Fallujah seige is wearing to an end. The Najaf seige is too. It's likely the chickenhawks will attack one of the cities or the other, or both, on the theory that if they get the bloodbaths over with in April the US electorate will forget about it by November. If they don't smash the rebellion now it will fester and emerge as a power once the "transfer of power" (fictitious as it is) takes place at the end of June, and this might obstruct the facade of democracy in Iraq.
We've got to stop thinking like human beings in order to figure out this administration. More like predators--raptors or the like. They'll do whatever it takes to maintain power.