Willravel

Our occupation is the cause of almost all of the fighting there. If we want the fighting to stop, we either:
1) STAY THE COURSE: Continue to get people from both sides killed. Eventually one side will run out of people, probably the insurgency, and then everyone who was fighting will no longer be able to fight because they'll be dead. We'll absorb massive casualties over the years, possibly decades, we are there. If I had to guess I'd say 8-12 years, and maybe 30,000-45,000 American soldiers dead total (as when the insurgency really begins to shrink they will become more desperate and resort to desperate measures, this will lead to the end being more bloody).
2) SEND MORE TROOPS: We are already stretched too thin, recruitment is down, and I doubt any number of military games for the PS3 or stupid commercials are going to help. This means one thing: the draft. That will take the administration's current popularity (around 30%?) and drop it to 0%, damning the Republican party for decades of servitude under the Democrats. Also, this would lead to massive unrest in the US, where we are already massively polarized, and could lead to violence and even a pseudo-civil war. We can't fight 2 different wars at once.
3) SLOW WITHDRAWL OF TROOPS: This is probably the most popular choice right now, as options 1 and 2 are obviously flawed (read: insane), and people want their loved ones home and are sick of war. We need our troops home training to deal with things that are actually our problem instead of invading soverign nations that never asked for our help. Slow withdrawl means that we step up our training of the Iraqi security forces in a big way, meaning that they are the ones that monitor the streets and our troops do primarily training. Less soldiers covered with American flags on the streets will instantly decrease violence. We pull out more and more as their forces take over more and more. We set a goal of 1 year to get all troops out of Iraq and we stick to it no matter what.
4) INSTANT WITHDRAWL OF TROOPS: We pull out today, the civil war ends, and they are left to run their own country as it is theirs to run. They are allowd to develop in the way they wish or are able to, and we get to stop all the fighting. No more soldiers with lost limbs coming home to a country that doesn't really care about them as much as they care about gay marriage or stem cells.

Iraq is more likely to be stronger if left to develop a government on their own instead of us acting as crutches with guns mounted on them. They are liable to become dependant on us if we stay there longer, and if that happens, we will never be able to leave because they'll never be ready for us to leave. They will assume that they cannot fight the insurgence on their own, not realizing that the insurgency would end if we left.