| Tuesday, November 20 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2020 Republican Presidential Nomination: Trump vs. Romney | The Hill/HarrisX | Trump 69, Romney 19 | Trump +50 |
| 2020 Republican Presidential Nomination: Trump vs. Kasich | The Hill/HarrisX | Trump 67, Kasich 14 | Trump +53 |
| 2020 Republican Presidential Nomination: Trump vs. Sasse | The Hill/HarrisX | Trump 70, Sasse 8 | Trump +62 |
| Tuesday, May 31 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| California Republican Presidential Primary | Hoover/Golden State Poll | Trump 66, Cruz 11, Kasich 7 | Trump +55 |
| Wednesday, May 11 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| Oregon Republican Presidential Primary | FOX 12/KPTV | Trump 45, Cruz 14, Kasich 14 | Trump +31 |
| Friday, May 6 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| West Virginia Republican Presidential Primary | MetroNews | Trump 57, Cruz 25, Kasich 14 | Trump +32 |
| Thursday, May 5 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| New Jersey Republican Presidential Primary | Monmouth | Trump 70, Kasich 15, Cruz 11 | Trump +55 |
| 2016 Republican Presidential Nomination | Pew Research | Trump 44, Cruz 25, Kasich 20 | Trump +19 |
| Tuesday, May 3 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| West Virginia Republican Presidential Primary | PPP (D) | Trump 61, Cruz 22, Kasich 14 | Trump +39 |
| Monday, May 2 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2016 Republican Presidential Nomination | CNN/ORC | Trump 49, Cruz 25, Kasich 19 | Trump +24 |
| Indiana Republican Presidential Primary | Gravis | Trump 44, Cruz 27, Kasich 9 | Trump +17 |
| California Republican Presidential Primary | KABC/SurveyUSA | Trump 54, Cruz 20, Kasich 16 | Trump +34 |
| Sunday, May 1 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| Indiana Republican Presidential Primary | NBC/WSJ/Marist | Trump 49, Cruz 34, Kasich 13 | Trump +15 |
| Friday, April 29 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| 2016 Republican Presidential Nomination | IBD/TIPP | Trump 48, Cruz 29, Kasich 16 | Trump +19 |
| Indiana Republican Presidential Primary | Clout Research (R) | Trump 37, Cruz 35, Kasich 16 | Trump +2 |
| Indiana Republican Presidential Primary | IPFW/Downs Center | Trump 29, Cruz 45, Kasich 13 | Cruz +16 |
| Indiana Republican Presidential Primary | ARG* | Trump 41, Cruz 32, Kasich 21 | Trump +9 |
| Thursday, April 28 |
| Race/Topic (Click to Sort) | Poll | Results | Spread |
|---|---|---|---|
| Oregon Republican Presidential Primary | Hoffman Research (R) | Trump 43, Cruz 26, Kasich 17 | Trump +17 |