Well, I disagree.
1) Your chart shows only some of the polls and relies heavily on SurveyUSA - a robopoll with a pretty poor accuracy record. (with 1/4 of the electorate undecided)
2) Campbell started falling when Carly filled the airwaves with $5 million in advertising (and w/ the Palin endorsement).
3) 4 out of the 5 polls you show reflect less than 2/3 of the electorate (i.e. more than 1/3 were undecided).
4) If Campbell was “breezing to victory”, 90% of the electorate would have been decided and he would have consistently shown a substantial lead in *all* polls.
5) How sad that the candidate who has the most personal wealth can so easily bury her opponents. So much for democracy.