Republicans, by and large, are frustrated with recent polls of the presidential election because they think Democrats are being oversampled. Many pollsters respond by saying that “weighting” the polls for partisan identification creates its own problems and might end up skewing the polls in the wrong direction.

I am not in favor of partisan weighting, per se, although some polls like the Rasmussen poll do it in a sensible and nuanced way.  So, I think the pollsters are offering a false choice between weighting and not weighting.