Nate Silver @NateSilver538
@SeanTrende I think there are kind of 4 camps: 1) People with poor news consumption habits, e.g. too much cable, which tends to emphasize bad news and isn't very numerate. 2) People who don't want to get others' hopes up. 3) People for whom pessimism is a coping mechanism. — PolitiTweet.org