The civil war will be short as Iran will invade Iraq after we leave. The result will be a bloodbath, and we are close to the next step of Iran launching a nuke at Israel, which will essentially cause Israel to wipe out Iran (remember, Israel has a substantial nuclear stockpile, believed to be around 200 warheads). I wonder how will the Democrats feel when the entire Middle East is in flames, destroying over 50% of the world's known oil reserves.
There is no terrorist threat! There is no terrorist threat! /s