Update: Here's a great analysis from Powerline on this.
Thought this was interesting ... via Instapundit.
Thirty-four percent (34%) of all voters say they will definitely vote for John McCain if he is on the ballot this November. Thirty-three percent (33%) will definitely vote against him while 29% say their support hinges on who his opponent is.
Barack Obama has the same number who will definitely vote for him--34%. But, more people are committed to voting against him than McCain. Forty-three percent (43%) say they will definitely reject him at the ballot box. For 18%, their support depends on his opponent.
Read more. Not sure at all what it means in the overall scheme of things though.