Hillary Clinton may have had a sense of déjà vu. Eight years ago, after being ahead all night in Missouri’s Democratic presidential primary — the Associated Press erroneously called the state for Clinton — she lost after Barack Obama surged ahead with late-reporting votes from St. Louis. This time around, the shoe was on the other foot.
http://fivethirtyeight.com/features/clinton-is-following-obamas-path-to-the-nomination/