| October 26–November 1, 2026 | Governor · 2026 Iowa | Rob Sand 51 · Zach Lahn 43 | Siena Research Institute | | 705 LV |
| October 27–November 1, 2026 | Governor · 2026 Texas | Gina Hinojosa 48 · Greg Abbott 47 | Siena Research Institute | | 1,215 LV |
| October 27–November 1, 2026 | U.S. Senate · 2026 Texas | James Talarico 50 · Ken Paxton 43 | Siena Research Institute | | 1,215 LV |
| October 26–November 1, 2026 | U.S. Senate · 2026 Ohio | Sherrod Brown 49 · Jon Husted 44 | Siena Research Institute | | 717 LV |
| October 26–November 1, 2026 | Governor · 2026 Ohio | Amy Acton 49 · Vivek Ramaswamy 43 | Siena Research Institute | | 717 LV |
| October 23–November 1, 2026 | U.S. Senate · 2026 Michigan | Abdul El-Sayed 53 · Mike Rogers 42 | Siena Research Institute | | 1,011 LV |
| October 23–November 1, 2026 | Governor · 2026 Michigan | Jocelyn Benson 52 · John James 39 | Siena Research Institute | | 1,011 LV |
| October 27–November 1, 2026 | Governor · 2026 Maine | Hannah Pingree 49 · Bobby Charles 37 · Rick Bennett 8 | Siena Research Institute | | 714 LV |
| October 27–November 1, 2026 | Governor · 2026 Kansas | Cindy Holscher 48 · Ty Masterson 47 | Siena Research Institute | | 736 LV |
| October 27–November 1, 2026 | U.S. Senate · 2026 Maine | Troy Jackson 51 · Susan Collins 45 | Siena Research Institute | | 714 LV |
| October 27–November 1, 2026 | U.S. Senate · 2026 Kansas | Adam Hamilton 49 · Roger Marshall 44 · David Graham 4 | Siena Research Institute | | 736 LV |
| October 26–November 1, 2026 | U.S. Senate · 2026 Iowa | Josh Turek 48 · Ashley Hinson 47 | Siena Research Institute | | 705 LV |
| October 23–October 30, 2026 | Governor · 2026 Alaska | Jonathan Kreiss-Tomkins 54 · Bernadette Wilson 46 | Siena Research Institute | | 610 LV |
| October 23–October 30, 2026 | U.S. House · 2026 AK-01 | Nick Begich 52 · Bill Hill 48 | Siena Research Institute | | 610 LV |
| October 23–October 30, 2026 | U.S. Senate · 2026 Alaska | Mary Peltola 48 · Dan Sullivan 46 | Siena Research Institute | | 610 LV |
| September 22–October 1, 2026 | Governor · 2026 Iowa | Rob Sand 52 · Zach Lahn 41 | Siena Research Institute | | 606 LV |
| September 24–October 1, 2026 | Governor · 2026 Alaska | Jonathan Kreiss-Tomkins 52 · Bernadette Wilson 48 | Siena Research Institute | | 431 LV |
| September 22–October 1, 2026 | Governor · 2026 Ohio | Amy Acton 49 · Vivek Ramaswamy 45 | Siena Research Institute | | 616 LV |
| September 22–September 30, 2026 | Governor · 2026 Texas | Gina Hinojosa 49 · Greg Abbott 46 | Siena Research Institute | | 605 LV |
| September 22–September 30, 2026 | Governor · 2026 Kansas | Ty Masterson 49 · Cindy Holscher 44 | Siena Research Institute | | 605 LV |
| September 15–September 22, 2026 | Governor · 2026 Michigan | Jocelyn Benson 48 · John James 43 | Siena Research Institute | | 605 LV |
| September 15–September 22, 2026 | Governor · 2026 Pennsylvania | Josh Shapiro 58 · Stacy Garrity 38 | Siena Research Institute | The Philadelphia Inquirer | 615 LV |
| September 15–September 22, 2026 | U.S. Senate · 2026 Maine | Susan Collins 49 · Troy Jackson 46 | Siena Research Institute | Portland Press Herald | 619 LV |
| September 15–September 22, 2026 | U.S. Senate · 2026 Michigan | Abdul El-Sayed 49 · Mike Rogers 44 | Siena Research Institute | | 605 LV |
| September 15–September 22, 2026 | U.S. Senate · 2026 New Hampshire | Chris Pappas 50 · John Sununu 45 | Siena Research Institute | | 613 LV |
| September 15–September 22, 2026 | Governor · 2026 Maine | Hannah Pingree 47 · Bobby Charles 34 · Rick Bennett 8 | Siena Research Institute | Portland Press Herald, Maine Trust for Local News | 619 LV |
| September 15–September 22, 2026 | Governor · 2026 New Hampshire | Kelly Ayotte 52 · Cinde Warmington 41 | Siena Research Institute | | 613 LV |
| August 17–August 21, 2026 | Governor · 2026 Pennsylvania | Josh Shapiro 54 · Stacy Garrity 37 | Siena Research Institute | The Philadelphia Inquirer | 760 RV |
| August 17–August 21, 2026 | Governor · 2026 Pennsylvania | Josh Shapiro 55 · Stacy Garrity 39 | Siena Research Institute | The Philadelphia Inquirer | 760 LV |
| June 15–June 29, 2026 | U.S. House · 2026 AK-01 | Nick Begich 51 · Matt Schultz 39 | Siena Research Institute | | 593 LV |
| June 15–June 29, 2026 | U.S. Senate · 2026 Alaska | Dan Sullivan 47 · Mary Peltola 45 | Siena Research Institute | | 593 LV |
| June 15–June 28, 2026 | U.S. Senate · 2026 Ohio | Jon Husted 50 · Sherrod Brown 47 | Siena Research Institute | | 601 LV |
| June 15–June 28, 2026 | Governor · 2026 Ohio | Amy Acton 47 · Vivek Ramaswamy 47 | Siena Research Institute | | 601 LV |
| June 19–June 27, 2026 | U.S. Senate · 2026 Texas | James Talarico 47 · Ken Paxton 47 | Siena Research Institute | | 656 LV |
| June 15–June 27, 2026 | U.S. Senate · 2026 North Carolina | Roy Cooper 50 · Michael Whatley 43 | Siena Research Institute | | 601 LV |
| June 15–June 27, 2026 | U.S. Senate · 2026 Iowa | Ashley Hinson 48 · Josh Turek 46 | Siena Research Institute | | 600 LV |
| June 19–June 27, 2026 | Governor · 2026 Texas | Greg Abbott 51 · Gina Hinojosa 44 | Siena Research Institute | | 656 LV |
| June 19–June 26, 2026 | U.S. Senate · 2026 Maine | Graham Platner 49 · Susan Collins 47 | Siena Research Institute | Portland Press Herald | 608 LV |
| June 19–June 26, 2026 | Governor · 2026 Maine | Hannah Pingree 50 · Bobby Charles 36 · Rick Bennett 8 | Siena Research Institute | Portland Press Herald | 608 LV |
| June 19–June 26, 2026 | Governor · 2026 Maine | Hannah Pingree 55 · Bobby Charles 40 | Siena Research Institute | Portland Press Herald | 608 LV |
| June 15–June 17, 2026 | Governor · 2026 Iowa | Rob Sand 48 · Zach Lahn 47 | Siena Research Institute | | 600 LV |
| May 11–May 15, 2026 | Job approval · Donald Trump | Disapprove 59 · Approve 37 | Siena Research Institute | | 1,507 RV |
| May 11–May 15, 2026 | Generic congressional ballot · 2026 | Dem 49.5 · Rep 39.1 | Siena Research Institute | | 1,507 RV |
| January 12–January 17, 2026 | Generic congressional ballot · 2026 | Dem 48 · Rep 43 | Siena Research Institute | | 1,625 RV |
| January 12–January 17, 2026 | Job approval · Donald Trump | Disapprove 56 · Approve 40 | Siena Research Institute | | 1,625 RV |
| September 22–September 27, 2025 | Job approval · Donald Trump | Disapprove 54 · Approve 43 | Siena Research Institute | | 1,313 RV |
| September 22–September 27, 2025 | Generic congressional ballot · 2026 | Dem 47 · Rep 45 | Siena Research Institute | | 1,313 RV |
| April 21–April 24, 2025 | Job approval · Donald Trump | Disapprove 54 · Approve 42 | Siena Research Institute | | 913 RV |
| April 21–April 24, 2025 | Generic congressional ballot · 2026 | Dem 47 · Rep 44 | Siena Research Institute | | 913 RV |
| April 21–April 24, 2025 | Favorability · Donald Trump | Unfavorable 56 · Favorable 43 | Siena Research Institute | | 913 RV |
| April 21–April 24, 2025 | Favorability · Supreme Court | Favorable 46 · Unfavorable 43 | Siena Research Institute | | 913 RV |
| July 22–July 24, 2024 | Favorability · JD Vance | Unfavorable 38 · Favorable 34 | Siena Research Institute | | 1,004 RV |
| July 22–July 24, 2024 | Favorability · JD Vance | Unfavorable 39 · Favorable 36 | Siena Research Institute | | 1,004 LV |