It is important to note that all promises of drawdowns or withdrawals are invariably linked to the dubious proposition that the Bush administration can "stand up" an effective Iraqi army and police force (think "Vietnamization" again), capable of circumscribing the Sunni insurgency and so allowing American troops to pull back to bases outside major urban areas, as well as to Kuwait and points as far west as the United States. Further, all administration or military withdrawal promises prove to be well hedged with caveats and obvious loopholes, phrases like "if all goes according to plan and security improves..." or "it also depends on the ability of the Iraqis to..."
http://www.workingforchange.com/article.cfm?ItemID=20377