I think civil war in Iraq depends upon your definition. Why wouldn't you consider one faction of Iraqis blowing up members of another faction on a regular basis a civil war?
The civil war in Iraq is the new lie that liberals and their media started to use few weeks ago when Al Qaeda blew up the Shia Golden Dome mosque in Samara. Liberals and their media are very much aware that the terrorist insurgency is dying so to keep their attacks against President Bush they came up with the new lie of civil war in Iraq. They and the terrorists will fail miserably and they will be both utterly defeated.