Today's Gallup tracking poll shows Obama up six over McCain. Gallup announces its "analysis" that Obama got a "typical" convention bounce of 4% and McCain got a "minimal" bounce from the announcement of Palin as his vice presidential candidate. Strangely, Gallup does not explain why the "typical" bounce for Obama is so much less than the 17% that Bush got in 88, the 16% that Clinton got in 92, the bounce exceeding 10% that Bush and Gore got in 2000, etc. As Gallup understands it, all of the other convention bounces of the last 20 years were "atypical".
As far as the vice presidential bounce is concerned, Gallup does admit that the 2% increase following the Palin selection is "technically" better than the 2% decrease following the Biden announcement. Somehow, a 4% difference following the vp selection is just technical when it is in McCain's favor, but the same 4 % is material and typical when it follows the convention and, most important, is in Obama's favor.
I have to say, it makes me wonder why the Gallup numbers seem to show better for Obama than the corresponding Rasmussen tracking poll. Could it be that the commentary is not the only thing that Gallup is slanting?
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