Nate Silver @NateSilver538
Very similar to last week, when they had it Sanders 26, Biden 25, Buttigieg 22, Warren 15, Klobuchar 7. — PolitiTweet.org
Political Polls @PpollingNumbers
#NEW Iowa @CBSNews /YouGov Poll: Biden 25 Sanders 25 Buttigieg 21 Warren 16 Klobuchar 5% https://t.co/cjeCwOqok3