They're entrance polls. The way the Iowa Caucus' work, there will be many caucus votes over the course of the night, each followed by one candidate's supporters trying to convince another candidate's supporters to join them.
You and I will not see a "reliable poll" until after this thing is over at 9pm and the actual final caucus votes are counted.
36 posted on 02/01/2016 5:50:29 PM PST by usconservative
(When The Ballot Box No Longer Counts, The Ammunition Box Does. (What's In Your Ammo Box?))