Congressman John Murtha writes a piece of Democratic campaign propaganda — but in doing so, he also sort of lays out his party's argument against the Iraq War. A couple of my Republican friends cite Murtha's opposition to the war as the moment they knew it was lost, at least in terms of support from the U.S. citizenry. Personally, I think the attempts to smear Murtha as a treasonous, pro-terrorist coward did a lot to make that happen. You can use that kind of attack on some people and get results…but use it against the wrong guy and it backfires.