FL 2018: Why did Gillum do so badly compared to polls?

[TML]

Here’s a take by a Florida-based Democratic strategist:

http://steveschale.com/blog/2018/12/10/lets-talk-about-polling-again.html

Long story short, he thinks that FL is more difficult to poll than it seems, especially since most statewide races over the past decade have been decided by no more than 2%.