Nate Silver @NateSilver538
Plus keep in mind that outliers do happen. One in 20 cases fall outside the margin of error. We update the model several times each day; you're going to have a couple of outliers a week. Bottom line: do not sweat a change unless it's AT LEAST 2 full points, e.g. from 30% to 32%. — PolitiTweet.org