Let's quit the politics of this for a bit and talk about the strategic intention and geo-politics behind this 'out'. Because I think that is by far, the most important.
The withdrawal of troops is meant to propel a surge elsewhere- the Af-Pak region, and I think, that has been pretty certain from:- 1) the rhetoric flying around and 2) recent events.
The coming months will witness a surge in Afghan operations. Until a security event will be used to justify operations in Pakistan. I have always harboured the suspicion that US stationings were never meant to be static, rather they were meant to be a flow, where paradigmatic shifts in security concerns, policies and methods prompted by a changing power balance and catalysed by spin doctors in the US and their ever willing allies in the media are given discharge by successive global 'combat' and then 'stability' operations.
As for Iraq, The US will not leave a power vacuum behind, I certainly don't think so, and will supplement the withdrawal by increasing use of Iraqi surrogates, private security contractors and own intelligence, this is merely a new phase of Iraqi occupation dressed up as the beginning of the end. This is also pretty obvious, because although tactics and nomenclature have changed, mission objectives remain the same. Chasing militants around the desert, with Iraqi help, has now just been started to be called 'stability operations', instead of 'combat operations'. This will, essentially, amount to the 'privatising' of Iraqi security under the State Dept. And Significantly, it will be under the State Department, not the Iraqi Parliament. Go figure.
I believe unrivalled energy assets, coupled with conventional overhang are the two new pinions of US geo-strategic policy. Rather, they are old pinions, given new force by a changing age and a changing security environment.
Watch out for Pakistan. Already, the new, more aggressive US salvo is coming evident with military drones elminating more than a half dozen Haqqani men in Miran Shah last week. And the 12-hour seige of the US Embassy in Kabul. Anybody who knows of the US embassy in Kabul, will tell you that it is just not possible to mount a lengthy-seige of the area without US compliance. Unless security was purposely weakened in anticipation of a frontal attack.
This is both an opportunity and a challenge to India. The key is to have withdrawable stakes and withdrawable agents, coupled with shared denigr-able responsibility. Joint operations with the US, for example, may be used to eliminate insurgent camps in Pakistn, where otherwise single Indian action may not be viable or worthwhile.