Also we should harken back to 2008 when Survey USA had McCain up 20 here as well.
...in a poll taken at the height of his convention bounce. They had him up 1 in the poll taken at this same point eight years ago.
You're insane if you think McCain was ever up 20, convention bounce or not...
The point is that it is hardly an apples to apples comparison.
1) Given that McCain was leading a fair share of national polls during his convention bounce, it would hardly be unreasonable to believe he was leading North Carolina by high single digits at the time, which is not as bad as the 21 point error the poster was implying SurveyUSA committed.
2) Of course a poll taken two months before Election Day will be less accurate than one one week before. SurveyUSA's poll at this point eight years ago showed McCain up by one, which is a two point error.
