The first line of this graph shows the actual results from the Democratic Iowa Caucus in 2008.
Notice here that Barack Obama ACTUALLY received 37.5% of the vote in the Iowa caucus.
The second line represents the average predicted for him by different polling organizations before the Iowa Caucuses took place. (This average calculates the most recent 5 or 6 averages taken for accuracy).
According to this, Obama was predicted to receive only 30.8% of the vote.
This data shows that Barack Obama polled 6.7% HIGHER in the actual Iowa Caucus.
Will we see a Bernie Sanders performance similar to Barack Obama's 2008 numbers?
Check out the latest polling results from Iowa below. (RealClearPolitics)