Good question, I would like the answer to that one also. I find it difficult to believe that this poll is anything but national.
This is a national poll. I'd like to see some weightings of Dems, Pubs and Indies in this poll. If Bush is taking 15% of the Dems and Kerry only 3% of Pubs, and Bush's lead is only 3 points, methinks LaTimes oversampled Dems again. I can't do that math.