Here's a link to the piece I did last week for Antiwar.com. In it I contend that President Bush's invocation of Vietnam in a recent speech is not scholarly history, but preparatory work to pinning the blame for "losing" Iraq on antiwar activists and the Democrats. I also explain why the analogies are mostly bogus.
It might seem astounding that they think that the people who started the war, based on faulty (probably cherry-picked) intelligance and had no plan for the occupation and continued doing things that were demonstrable failures think they can put the blame elsewhere -- most especially on those who were right from the beginning about the wisdom of war with Iraq -- when it becomes ever more apparent that Iraq was a mistake and carried out incompetently. But they think they can.