| Friday, October 23 |
 |
Donald Trump (R)
Joseph 'Joe' R. Biden, Jr. (D)
|
49%
43%
| (+6) |
| Source: NY Times/Siena* |
| Monday, October 12 |
|
Donald Trump (R)
Joseph 'Joe' R. Biden, Jr. (D)
|
52%
46%
| (+6) |
| Source: PPP (D) |
| Thursday, October 08 |
|
Donald Trump (R)
Joseph 'Joe' R. Biden, Jr. (D)
|
56%
43%
| (+13) |
| Source: Emerson |
|
Steven 'Steve' Daines (R)
Steve Bullock (D)
|
52%
43%
| (+9) |
| Source: Emerson |
|
Greg Gianforte (R)
Mike Cooney (D)
|
54%
41%
| (+13) |
| Source: Emerson |
| Monday, August 03 |
|
Donald Trump (R)
Joseph 'Joe' R. Biden, Jr. (D)
|
53%
42%
| (+11) |
| Source: Emerson |
|
Greg Gianforte (R)
Mike Cooney (D)
|
50%
41%
| (+9) |
| Source: Emerson |
|
Steve Daines (R)
Steve Bullock (D)
|
50%
44%
| (+6) |
| Source: Emerson |
| Monday, July 13 |
|
Greg Gianforte (R)
Mike Cooney (D)
|
46%
42%
| (+4) |
| Source: PPP (D) |
|
Donald Trump (R)
Joseph 'Joe' R. Biden, Jr. (D)
|
51%
42%
| (+9) |
| Source: PPP (D) |
|
Steve Bullock (D)
Steven 'Steve' Daines (R)
|
46%
44%
| (+2) |
| Source: PPP (D) |
|
Matt Rosendale (R)
Kathleen Williams (D)
|
44%
44%
| Tie |
| Source: PPP (D) |
| Tuesday, October 30 |
|
Greg Gianforte (R)
Kathleen Williams (D)
|
48%
48%
| Tie |
| Source: Gravis |
| Tuesday, October 23 |
|
Jon Tester (D)
Matt Rosendale (R)
|
46%
43%
| (+3) |
| Source: MTN-MSU |
| Tuesday, September 25 |
|
Greg Gianforte
Kathleen Williams
|
51%
42%
| (+9) |
| Source: Gravis |
|
Jon Tester
Matt Rosendale
|
49%
45%
| (+4) |
| Source: Gravis |
| Thursday, July 12 |
|
Jon Tester
Matt Rosendale
|
49%
46%
| (+3) |
| Source: Remington Research (R) |
| Tuesday, June 19 |
|
Kathleen Williams
Greg Gianforte
|
49%
43%
| (+6) |
| Source: Gravis |
|
Jon Tester
Matt Rosendale
|
52%
44%
| (+8) |
| Source: Gravis |
Montana Election Center