It is called "persistence of image"
Google "goebbels" for references.
Everyone who would be influenced by information the quality of a Michael Moore film was going to vote against Bush anyway. I do think that the G.O.P. needs to evaluate this situation - on my more cynical days I tend to think that the dumbing down of America may be about to bear fruit in producing a generation on which this low grade propaganda may actually have an effect. I just don't think we're there - yet.