| Thursday, October 15 |
 |
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
50%
40%
| (+10) |
| Source: Pan Atlantic |
| Friday, September 25 |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
50%
39%
| (+11) |
| Source: Colby College |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
45%
41%
| (+4) |
| Source: Colby College |
| Monday, September 21 |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
51%
39%
| (+12) |
| Source: Boston Globe/Suffolk* |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
46%
41%
| (+5) |
| Source: Boston Globe/Suffolk* |
| Friday, September 18 |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
55%
38%
| (+17) |
| Source: NY Times/Siena |
| Wednesday, September 16 |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
54%
42%
| (+12) |
| Source: Quinnipiac |
| Thursday, August 06 |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
47%
43%
| (+4) |
| Source: Quinnipiac |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
52%
37%
| (+15) |
| Source: Quinnipiac |
| Tuesday, July 28 |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
50%
38%
| (+12) |
| Source: Colby College/Socialsphere |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
44%
39%
| (+5) |
| Source: Colby College/Socialsphere |
| Monday, July 06 |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
53%
42%
| (+11) |
| Source: PPP (D) |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
46%
42%
| (+4) |
| Source: PPP (D) |
| Thursday, March 05 |
|
Sara Gideon (D)
Susan Margaret Collins (R)
|
47%
43%
| (+4) |
| Source: PPP (D) |
| Tuesday, October 15 |
|
Joseph 'Joe' R. Biden, Jr. (D)
Donald Trump (R)
|
54%
42%
| (+12) |
| Source: PPP (D) |
| Friday, October 19 |
|
Bruce Poliquin (R)
Jared Golden (D)
|
41%
41%
| Tie |
| Source: New York Times/Siena |
| Wednesday, August 08 |
|
Angus King
Eric Brakey
|
52%
25%
| (+27) |
| Source: Suffolk* |
|
Shawn Moody
Janet Mills
|
39%
39%
| Tie |
| Source: Suffolk* |
| Sunday, September 25 |
|
Hilary Clinton
Donald Trump
Johnson
Stein
|
40%
37%
12%
3%
| |
| Source: General: Gravis |
Maine Election Center