I am putting Sean Trende's discussion of exit polls in the context of Wisconsin, and their attendant issues
here, because it is in the context of the Wisconsin Exit Poll after being "adjusted" showing Obama ahead of Romney by 7 points in Wisconsin. You can read all about more conservative voters not talking to exit pollers disproportionately, and how re-weighting exit poll precinct results to match the precinct actual vote for one race does not necessarily mean it does the job for another race not on the ballot. Ditto with absentee voters who are not polled in an exit poll. The issue is whether Walker voters who answered the exit poll were more pro Obama than those who told the exit poller to get out of their face and eat sh*t and die. And nobody knows the answer.
A bonus is the cell phone thing for the land line-less for polls in general. Just overweighting the youngs in a poll is no longer a fix, as land lines go the way of the horse and buggy disproportionately for the more hip (and maybe impecunious) irrespective of age, who also tend to be the more Dem.
