IIRC, Silver actually defender Rasmussen for a while, because all pollsters have some sort of house effect. Silver also is on record that Rasmussen has shown very little (about 1.3) house effect this year. In other words, their GOP bias seems to be a little smaller than other times. Another thing to keep in mind: Rasmussen was pretty good in 2008, they were also not that good in the 2010 elections.
Every pollster is criticized for bias, their methodology, and even how they pose questions. This isn't necessarily new or exclusive to Rasmussen. Polling in general has become harder and harder to do (a good article about it here).
If anything, Nate Silver and his 538 methodology has done better than any pollster in the last 2 elections. That doesn't mean he knows what the secret sauce is either. The thing is, relying on a single pollster isn't a good idea anyways.

Reply With Quote

