| Thursday, April 9 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | CNN | Biden 65, Sanders 30 | Biden +35 |
| Wednesday, April 8 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | Economist/YouGov | Biden 62, Sanders 32 | Biden +30 |
| Tuesday, April 7 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | IBD/TIPP | Biden 62, Sanders 30 | Biden +32 |
| 2020 Democratic Presidential Nomination | Morning Consult | Biden 61, Sanders 36 | Biden +25 |
| Wednesday, April 1 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| Wisconsin Democratic Primary | Marquette | Biden 62, Sanders 34 | Biden +28 |
| 2020 Democratic Presidential Nomination | Economist/YouGov | Biden 55, Sanders 40 | Biden +15 |
| Tuesday, March 31 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | The Hill/HarrisX | Biden 54, Sanders 32 | Biden +22 |
| 2020 Democratic Presidential Nomination | Morning Consult | Biden 61, Sanders 36 | Biden +25 |
| Monday, March 30 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | Harvard-Harris | Biden 58, Sanders 32 | Biden +26 |
| Sunday, March 29 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | ABC News/Wash Post | Biden 55, Sanders 39 | Biden +16 |
| Wednesday, March 25 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | Reuters/Ipsos | Biden 53, Sanders 34 | Biden +19 |
| 2020 Democratic Presidential Nomination | Economist/YouGov | Biden 57, Sanders 39 | Biden +18 |
| Tuesday, March 24 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | Morning Consult | Biden 60, Sanders 36 | Biden +24 |
| Friday, March 20 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Democratic Presidential Nomination | Emerson | Biden 54, Sanders 42 | Biden +12 |