Presidential elections are high-stakes affairs. So perhaps it is no surprise that when supporters of one candidate do not like the message they are hearing from the polls they tend to blame the messenger.
In 2004, Democratic Web sites were convinced that the polls were biased toward George W. Bush, asserting that they showed an implausible gain in the number of voters identifying as Republicans. …
Since President Obama gained ground in the polls after the Democrats’ convention, it has been the Republicans’ turn to make the same accusations. [cont.]
Nate Silver, FiveThirtyEight (NYT)