Nate Silver @NateSilver538
This helps explain why Sanders and Biden tend to have pretty steady numbers while Buttigieg and Warren see theirs swing up and down a lot. — PolitiTweet.org
CBS News Poll @CBSNewsPoll
Across the 18 early states, Sanders supporters are more likely than backers of the other leading candidates to say… https://t.co/k8lIARGZur