This deep red state has only voted Democratic in a presidential election four times since it was admitted to the union in 1889.
Entrepreneur returns to the stage after missing the cut in January
The Vermont Senator received 25% support, up 6 points from the same poll in late October
Biden has a small lead over Sanders nationally, but it's a four-way battle in Iowa
A deep-blue state today, but also one that voted Republican in 27 consecutive presidential elections