| 11/5/2018 | HarrisX | 1.00 | —(R+0.4) | 600 | ±4.0 | unknown | 🟡2743d old🔵tracks editorial consensus+1- 🟡
2743d old Poll was fielded 2743 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 45.0 · Jacky Rosen 47.0 | pollarch |
| 11/4/2018 | HarrisX | 1.00 | —(R+0.4) | 600 | ±4.0 | unknown | 🟡2744d old🔵tracks editorial consensus+1- 🟡
2744d old Poll was fielded 2744 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 46.0 · Jacky Rosen 46.0 | pollarch |
| 11/4/2018 | Emerson College | 1.00 | —(D+0.7) | 1197 | ±3.0 | unknown | 🟡2744d old🔵tracks editorial consensus+1- 🟡
2744d old Poll was fielded 2744 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 234 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias D+0.7pt Across 117 historical scored polls this pollster's average error vs. actual margin is D+0.7pt — within ±1pt.
| Dean Heller 45.0 · Jacky Rosen 49.0 | pollarch |
| 11/3/2018 | HarrisX | 1.00 | —(R+0.4) | 600 | ±4.0 | unknown | 🟡2745d old🔵tracks editorial consensus+1- 🟡
2745d old Poll was fielded 2745 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 46.0 · Jacky Rosen 45.0 | pollarch |
| 11/2/2018 | HarrisX | 1.00 | —(R+0.4) | 600 | ±4.0 | unknown | 🟡2746d old🔵tracks editorial consensus+1- 🟡
2746d old Poll was fielded 2746 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 45.0 · Jacky Rosen 44.0 | pollarch |
| 11/1/2018 | HarrisX | 1.00 | —(R+0.4) | 600 | ±4.0 | unknown | 🟡2747d old🔵tracks editorial consensus+1- 🟡
2747d old Poll was fielded 2747 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 46.0 · Jacky Rosen 43.0 | pollarch |
| 11/1/2018 | Trafalgar Group | 1.00 | —(R+2.1) | 2587 | ±1.9 | unknown | 🟠methodology not disclosed🟠commissioned by R-aligned: Internal R-aligned+3- 🟠
methodology not disclosed Methodology not disclosed publicly; declined to participate in AAPOR Transparency Initiative. Included for transparency rather than weight-zeroing — many forecasters still include their polls — but the methodology opacity is worth surfacing. Source: https://en.wikipedia.org/wiki/Trafalgar_Group - 🟠
commissioned by R-aligned: Internal R-aligned This poll was commissioned by a Republican-aligned committee, party, or PAC (Internal R-aligned). Such polls historically lean toward their sponsor. - 🟡
2747d old Poll was fielded 2747 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🟡
R+4.1pt vs editors Across 7 historical polls where ≥2 editorial raters had rated the race (Cook / Sabato / IE / 538 / DDHQ etc.), this pollster's D-margin averaged 4.1pt MORE R-favorable than the rater consensus. Systematic R-lean relative to conventional wisdom. - 🔵
n=2,587 Sample size of 2,587 respondents implies a margin of error around ±1.9pt — tighter than the ~600-respondent typical.
| Dean Heller 49.0 · Jacky Rosen 46.0 | pollarch |
| 10/31/2018 | HarrisX | 1.00 | —(R+0.4) | 600 | ±4.0 | unknown | 🟡2748d old🔵tracks editorial consensus+1- 🟡
2748d old Poll was fielded 2748 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 45.0 · Jacky Rosen 45.0 | pollarch |
| 10/30/2018 | HarrisX | 1.00 | —(R+0.4) | 1400 | ±2.6 | unknown | 🟡2749d old🔵tracks editorial consensus+1- 🟡
2749d old Poll was fielded 2749 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 67 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias R+0.4pt Across 65 historical scored polls this pollster's average error vs. actual margin is R+0.4pt — within ±1pt.
| Dean Heller 43.0 · Jacky Rosen 46.0 | pollarch |
| 10/29/2018 | CNN/SSRS | 1.00 | —(D+4.4) | 622 | ±4.8 | LV | 🟠historical bias D+4.4pt🟡2750d old+1- 🟠
historical bias D+4.4pt Across 17 historical scored polls the average error vs. actual margin is D+4.4pt — a measurable house effect. - 🟡
2750d old Poll was fielded 2750 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - ⚪
likely-voter screen Likely-voter screen — pollster filters respondents by reported turnout intent. Generally tighter for predicting elections than registered- or adult-population polls.
| Dean Heller 45.0 · Jacky Rosen 48.0 · Tim Hagan 2.0 | pollarch |
| 10/26/2018 | Gravis Marketing | 0.72 | L(D+2.9) | 773 | ±3.5 | unknown | 🟡bias D+2.9pt🟡2753d old+1- 🟡
bias D+2.9pt Across 33 historical scored polls the average error vs. actual margin is D+2.9pt. - 🟡
2753d old Poll was fielded 2753 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🟡
uncorrelated with editorial consensus Across 49 historical paired polls, this pollster's margins don't track the editorial consensus (Pearson r < 0.5). Independence from consensus is informational — could indicate genuine methodological independence or noisy results.
| Dean Heller 45.0 · Jacky Rosen 47.0 | pollarch |
| 10/19/2018 | Ipsos | 1.00 | —(R+1.9) | 1137 | ±3.0 | unknown | 🟡2760d old🔵tracks editorial consensus- 🟡
2760d old Poll was fielded 2760 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 16 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom.
| Dean Heller 47.0 · Jacky Rosen 41.0 | pollarch |
| 10/16/2018 | Public Policy Polling (D-Protect Our Care) | 1.00 | — | 648 | ±3.9 | unknown | 🟡no scored polls🟡2763d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2763d old Poll was fielded 2763 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 46.0 · Jacky Rosen 48.0 | pollarch |
| 10/15/2018 | Vox Populi Polling | 0.96 | —(D+1.9) | 614 | ±3.7 | unknown | 🟡2764d old🔵tracks editorial consensus- 🟡
2764d old Poll was fielded 2764 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 15 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom.
| Dean Heller 49.0 · Jacky Rosen 51.0 | pollarch |
| 10/12/2018 | Emerson College | 1.00 | —(D+0.7) | 625 | ±4.2 | unknown | 🟡2767d old🔵tracks editorial consensus+1- 🟡
2767d old Poll was fielded 2767 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 234 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom. - 🟢
accurate · bias D+0.7pt Across 117 historical scored polls this pollster's average error vs. actual margin is D+0.7pt — within ±1pt.
| Dean Heller 48.0 · Jacky Rosen 41.0 | pollarch |
| 10/10/2018 | NYT Upshot/Siena College | 0.87 | —(D+1.7) | 642 | ±4.0 | unknown | 🟡3 scored polls🟡2769d old+1- 🟡
3 scored polls Pollster has only 3 historical polls with a known outcome to score against — too few for stable accuracy estimates. - 🟡
2769d old Poll was fielded 2769 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
university-sponsored: Siena College Commissioned by Siena College, an independent media or academic sponsor. Independent sponsorship doesn't guarantee accuracy but rules out direct campaign funding.
| Dean Heller 47.0 · Jacky Rosen 45.0 | pollarch |
| 10/3/2018 | NBC News/Marist | 0.75 | L(D+5.1) | 574 | ±5.5 | LV | 🟠historical bias D+5.1pt🟡2776d old+2- 🟠
historical bias D+5.1pt Across 11 historical scored polls the average error vs. actual margin is D+5.1pt — a measurable house effect. - 🟡
2776d old Poll was fielded 2776 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - ⚪
likely-voter screen Likely-voter screen — pollster filters respondents by reported turnout intent. Generally tighter for predicting elections than registered- or adult-population polls. - 🔵
tracks editorial consensus Across 12 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom.
| Dean Heller 44.0 · Jacky Rosen 42.0 · Tim Hagan 8.0 | pollarch |
| 10/2/2018 | Kaiser Family Foundation/SSRS | 1.00 | — | 513 | ±5.0 | unknown | 🟡no scored polls🟡2777d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2777d old Poll was fielded 2777 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 45.0 · Jacky Rosen 44.0 | pollarch |
| 9/29/2018 | CNN/SSRS | 1.00 | —(D+4.4) | 693 | ±4.6 | LV | 🟠historical bias D+4.4pt🟡2780d old+1- 🟠
historical bias D+4.4pt Across 17 historical scored polls the average error vs. actual margin is D+4.4pt — a measurable house effect. - 🟡
2780d old Poll was fielded 2780 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - ⚪
likely-voter screen Likely-voter screen — pollster filters respondents by reported turnout intent. Generally tighter for predicting elections than registered- or adult-population polls.
| Dean Heller 43.0 · Jacky Rosen 47.0 · Tim Hagan 4.0 | pollarch |
| 9/17/2018 | Ipsos | 1.00 | —(R+1.9) | 1039 | ±4.0 | unknown | 🟡2792d old🔵tracks editorial consensus- 🟡
2792d old Poll was fielded 2792 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
tracks editorial consensus Across 16 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom.
| Dean Heller 46.0 · Jacky Rosen 43.0 | pollarch |
| 9/12/2018 | Gravis Marketing | 0.72 | L(D+2.9) | 700 | ±3.7 | unknown | 🟡bias D+2.9pt🟡2797d old+1- 🟡
bias D+2.9pt Across 33 historical scored polls the average error vs. actual margin is D+2.9pt. - 🟡
2797d old Poll was fielded 2797 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🟡
uncorrelated with editorial consensus Across 49 historical paired polls, this pollster's margins don't track the editorial consensus (Pearson r < 0.5). Independence from consensus is informational — could indicate genuine methodological independence or noisy results.
| Dean Heller 45.0 · Jacky Rosen 47.0 | pollarch |
| 9/10/2018 | Suffolk University | 1.44 | neutral(D+0.1) | 500 | ±4.4 | unknown | 🟡2799d old🔵bias D+0.1pt+1- 🟡
2799d old Poll was fielded 2799 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
bias D+0.1pt Across 15 historical scored polls the average error vs. actual margin is D+0.1pt. - 🔵
tracks editorial consensus Across 55 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom.
| Dean Heller 41.0 · Jacky Rosen 42.0 · Tim Hagan 2.0 | pollarch |
| 8/21/2018 | Public Policy Polling (D-Protect Our Care) | 1.00 | — | 528 | ±4.3 | unknown | 🟡no scored polls🟡2819d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2819d old Poll was fielded 2819 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 43.0 · Jacky Rosen 48.0 | pollarch |
| 7/29/2018 | Suffolk University | 1.44 | neutral(D+0.1) | 500 | ±4.4 | unknown | 🟡2842d old🔵bias D+0.1pt+1- 🟡
2842d old Poll was fielded 2842 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
bias D+0.1pt Across 15 historical scored polls the average error vs. actual margin is D+0.1pt. - 🔵
tracks editorial consensus Across 55 historical paired polls, this pollster's D-margins track the rater consensus (Cook / Sabato / IE / 538 / DDHQ etc.) with high correlation (r ≥ 0.85) and small mean delta (|Δ| ≤ 2pt). Their results align with conventional wisdom.
| Dean Heller 41.0 · Jacky Rosen 40.0 · Tim Hagan 2.0 | pollarch |
| 7/2/2018 | SurveyMonkey/Axios | 1.00 | — | 1097 | ±5.5 | unknown | 🟡no scored polls🟡2869d old+1- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2869d old Poll was fielded 2869 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
newspaper-sponsored: Axios Commissioned by Axios, an independent media or academic sponsor. Independent sponsorship doesn't guarantee accuracy but rules out direct campaign funding.
| Dean Heller 45.0 · Jacky Rosen 48.0 | pollarch |
| 6/26/2018 | Gravis Marketing | 0.72 | L(D+2.9) | 630 | ±3.9 | unknown | 🟡bias D+2.9pt🟡2875d old+1- 🟡
bias D+2.9pt Across 33 historical scored polls the average error vs. actual margin is D+2.9pt. - 🟡
2875d old Poll was fielded 2875 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🟡
uncorrelated with editorial consensus Across 49 historical paired polls, this pollster's margins don't track the editorial consensus (Pearson r < 0.5). Independence from consensus is informational — could indicate genuine methodological independence or noisy results.
| Dean Heller 41.0 · Jacky Rosen 45.0 | pollarch |
| 5/1/2018 | Public Policy Polling (D-Health Care Voter) | 1.00 | — | 637 | ±3.9 | unknown | 🟡no scored polls🟡2931d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2931d old Poll was fielded 2931 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 42.0 · Jacky Rosen 44.0 | pollarch |
| 4/23/2018 | SurveyMonkey/Axios | 1.00 | — | 1332 | ±5.0 | unknown | 🟡no scored polls🟡2939d old+1- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2939d old Poll was fielded 2939 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🔵
newspaper-sponsored: Axios Commissioned by Axios, an independent media or academic sponsor. Independent sponsorship doesn't guarantee accuracy but rules out direct campaign funding.
| Dean Heller 44.0 · Jacky Rosen 50.0 | pollarch |
| 4/19/2018 | The Mellman Group | 1.00 | — | 600 | ±4.0 | unknown | 🟡no scored polls🟡2943d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2943d old Poll was fielded 2943 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 40.0 · Jacky Rosen 39.0 | pollarch |
| 3/17/2018 | Public Policy Polling (D-Protect Our Care) | 1.00 | — | 720 | ±3.7 | unknown | 🟡no scored polls🟡2976d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
2976d old Poll was fielded 2976 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 39.0 · Jacky Rosen 44.0 | pollarch |
| 7/27/2017 | Public Policy Polling (D-Our Lives on the Line) | 1.00 | — | 847 | ±3.6 | unknown | 🟡no scored polls🟡3209d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
3209d old Poll was fielded 3209 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 31.0 | pollarch |
| 6/29/2017 | Anzalone Liszt Grove Research | 1.00 | — | 600 | ±4.0 | unknown | 🟡no scored polls🟡3237d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
3237d old Poll was fielded 3237 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 47.0 · Dina Titus 45.0 | pollarch |
| 6/25/2017 | Public Policy Polling | 1.00 | —(D+1.1) | 648 | ±3.9 | unknown | 🟡3241d old🟡uncorrelated with editorial consensus+1- 🟡
3241d old Poll was fielded 3241 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average. - 🟡
uncorrelated with editorial consensus Across 368 historical paired polls, this pollster's margins don't track the editorial consensus (Pearson r < 0.5). Independence from consensus is informational — could indicate genuine methodological independence or noisy results. - 🔵
bias D+1.1pt Across 72 historical scored polls the average error vs. actual margin is D+1.1pt.
| Dean Heller 41.0 · Jacky Rosen 42.0 | pollarch |
| 6/14/2017 | Public Policy Polling (D-Save My Care) | 1.00 | — | 706 | ±3.4 | unknown | 🟡no scored polls🟡3252d old- 🟡
no scored polls Pollster has no historical polls with a known outcome in our database, so accuracy and bias cannot be measured. - 🟡
3252d old Poll was fielded 3252 days ago. Older polls reflect an earlier state of the race and are weighted down in the rolling average.
| Dean Heller 39.0 | pollarch |