
Nate Silver @NateSilver538
The differences are modest enough that the best online and/or IVR pollsters (e.g. SurveyUSA and YouGov have good results) outperform many phone polls. But there's also a lot of crap out there. One should be wary of online/IVR polls with no track record. https://t.co/S65fs7LYsH — PolitiTweet.org