Take on the projected winner

I've taken a collegiate level intro to statistics and an advanced statistics course and have applied them to almost everything important I have ever done including keeping sabermetrics for my fantasy football league. With all that experience you'd think that if be somewhat clear in how the hell a news network calls an election when there are literally zero votes placed. I get that they have confidence in their polling and have the best exit polls in the business but it is a bit odd that CNN called the Mississippi primary for the Democrats before literally one vote was tallied.

At some point we may not even have to vote, CNN will just project the winner before a single person who would eventually vote in that primary has even been birthed.