Michigan, Missouri, Florida, Arizona
| pollster | date | Biden | Sanders | Warren | Bloomberg | Buttigieg | Klobuchar | Gabbard | Harris | Booker | Yang | O'Rourke | Castro | Bennet | Delaney | Sestak | Bullock | Williamson | Hickenlooper | Gillibrand | Inslee | spread |
|---|
| pollster | date | Biden | Sanders | Gabbard | Bloomberg | Warren | Klobuchar | Buttigieg | Yang | Steyer | Harris | O'Rourke | spread |
|---|
| pollster | date | Biden | Sanders | Gabbard | Bloomberg | Warren | Klobuchar | Buttigieg | Steyer | Yang | Booker | Bennet | Delaney | Patrick | O'Rourke | Harris | Messam | Bullock | de Blasio | Ryan | Castro | Gillibrand | Moulton | Gravel | Hickenlooper | Inslee | Delaney | Williamson | Swalwell | spread |
|---|
| pollster | date | Biden | Sanders | Gabbard | Warren | Bloomberg | Buttigieg | Harris | Yang | Klobuchar | Castro | O'Rourke | Booker | Steyer | Bennet | Sestak | Delaney | Bullock | Williamson | Gillibrand | Ryan | Hickenlooper | Inslee | spread |
|---|
