Nate Silver @NateSilver538
There are lots of scenarios where at least one candidate from outside the current top 5 (say, Castro/Booker/Beto/Klob) surges to become a big player in the race…but then finishes in a respectable 3rd place. It's like a No. 12 seed reaching the Final 4 but not winning it all. — PolitiTweet.org