Harvard-Harris: Biden 24, Sanders 13, O'Rourke 9, Warren 5, Bloomberg 5, Gabbard 5, Harris 4, Booker 2, Castro 2, Gillibrand 1.
Politico: Biden 26, Sanders 16, Harris 9, O'Rourke 6, Warren 6, Booker 4, Bloomberg 2, Castro 2, Gillibrand 2, Brown 1.
Des Moines Register: Biden 32, Sanders 19, O'Rourke 11, Warren 8, Harris 5, Booker 4, Bloomberg 3, Klobuchar 3