His group will not advise partition, but is believed to favour a division of the country that will devolve power and security to the regions, leaving a skeletal national government in Baghdad in charge of foreign affairs, border protection and the distribution of oil revenue.
The Iraqi government will be encouraged to hold a constitutional conference paving the way for greater devolution. Iran and Syria will be urged to back a regional settlement that could be brokered at an international conference.
They are not advising splitting into three different countries, but greater federalization. And it isn't the "Americans" who are going to do it, it will be the Iraqis who choose (or not) to do it through a constitutional convention.
Santa Claus. Tooth Fairy. Iraqi Constitutional Republic.