So much for that

Leader of the "Anbar Miracle" killed.

The leading suspects include all of the nationalist insurgent groups, AQI, and some of this internal Sunni rivals to boot.

And here's an important point: the Sunni nationalist insurgency is simply put the largest and most problematic force in Iraq for the Americans. They are the ones primarily responsible for attacks on US troops (though all sectors of Iraqi Arabs increasingly support attacks on Americans) and today's assassination shows that they have the ability to respond to American strategy with a strategy of their own.