# 2024 United States Senate election in Maine

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2026 :
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Question 5 :
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2023 :
vte :
The 2024 United States Senate election in Maine was held on November 5, 2024, to elect a member of the U.S. Senate to represent the state of Maine. Incumbent independent Senator Angus King won re-election to a third term, defeating Democratic nominee David Costello, Republican nominee Demitroula Kouzounas, and independent Jason Cherry. Primary elections took place on June 11, 2024.
This election coincided with five referendum questions, including a referendum to change the state flag, as well as the presidential election, U.S. House elections for the state's two congressional districts, and various other state, county and local elections.
King won re-election to a third term in office with 52.06% of the vote.

## Independents
### Candidates
#### Declared

* Jason Cherry, attorney and former FBI agent
* Angus King, incumbent U.S. senator

### Endorsements

U.S. Senators
* Joe Manchin, former U.S. senator from West Virginia (2010–2025) (Independent; Democratic until 2024)
Labor unions
* AFL-CIO
Organizations
* American Israel Public Affairs Committee (AIPAC)
* Feminist Majority PAC
* International Franchise Association
* Jewish Democratic Council of America
* J Street PAC
* League of Conservation Voters
* Planned Parenthood Action Fund
* Population Connection Action Fund

### Fundraising

Campaign finance reports as of July 24, 2024 :
| Candidate | Raised | Spent | Cash on hand |
| Angus King (I) | $4,802,784 | $2,069,527 | $3,118,927 |
| Jason Cherry (I) | $110,000 | $95,478 | $6,011 |
| Source: Federal Election Commission ||||

## Republican primary
### Candidates
#### Nominee

* Demitroula "Demi" Kouzounas, former chair of the Maine Republican Party

### Endorsements

U.S. representatives
* Bruce Poliquin, Former U.S. Representative (2015–2019)
Governors
* Paul LePage, Former Governor of Maine (2011–2019)

### Fundraising

Campaign finance reports as of May 22, 2024 :
| Candidate | Raised | Spent | Cash on hand |
| Demi Kouzounas (R) | $300,712 | $55,731 | $244,980 |
| Source: Federal Election Commission ||||

### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Demi Kouzounas | 58,832 | 100.0% |
| Total votes | Total votes | Total votes | 58,832 | 100.0% |

## Democratic primary
### Candidates
#### Nominee

* David Costello, consultant and former deputy secretary of the Maryland Department of the Environment

### Fundraising

Campaign finance reports as of May 22, 2024 :
| Candidate | Raised | Spent | Cash on hand |
| David Costello (D) | $72,408 | $13,302 | $59,424 |
| Source: Federal Election Commission ||||

### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | David Costello | 54,537 | 100.0% |
| Total votes | Total votes | Total votes | 54,537 | 100.0% |

## General election
### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Solid I | November 9, 2023 |
| Inside Elections | Solid I | November 9, 2023 |
| Sabato's Crystal Ball | Safe I | September 5, 2024 |
| Decision Desk HQ/The Hill | Safe I | October 11, 2024 |
| Elections Daily | Safe I | May 4, 2023 |
| CNalysis | Solid I | November 21, 2023 |
| RealClearPolitics | Solid I | August 5, 2024 |
| Split Ticket | Safe I | October 23, 2024 |
| 538 | Likely I | October 23, 2024 |

### Fundraising

Campaign finance reports as of September 30, 2024 :
| Candidate | Raised | Spent | Cash on hand |
| Angus King (I) | $4,802,784 | $2,069,527 | $3,118,927 |
| Demi Kouzounas (R) | $503,998 | $170,805 | $333,192 |
| David Costello (D) | $109,637 | $24,063 | $85,894 |
| Jason Cherry (I) | $110,000 | $95,478 | $6,011 |
| Source: Federal Election Commission ||||

### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Angus King (I) | Demi Kouzounas (R) | David Costello (D) | Other | Undecided |
| University of New Hampshire | October 29 - November 2, 2024 | 1,485 (LV) | ± 2.4% | 50% | 35% | 7% | 1% | 6% |
| SurveyUSA | October 24–29, 2024 | 1,079 (LV) | ± 3.6% | 54% | 28% | 8% | 3% | 8% |
| Pan Atlantic Research | September 5–15, 2024 | 812 (LV) | ± 3.5% | 53% | 23% | 8% | 1% | 16% |
| University of New Hampshire | August 15–19, 2024 | 951 (LV) | ± 3.2% | 43% | 33% | 9% | 4% | 12% |
| Digital Research | April 8–30, 2024 | 609 (RV) | ± 4.0% | 57% | 28% | 12% | – | 3% |

### Results

2024 United States Senate election in Maine :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Angus King (incumbent) | 427,331 | 52.06% | −2.25 |
| | Republican | Demi Kouzounas | 284,338 | 34.64% | −0.59 |
| | Democratic | David Costello | 88,891 | 10.83% | +0.38 |
| | Independent | Jason Cherry | 20,222 | 2.46% | N/A |
| Total votes | Total votes | Total votes | 820,782 | 100.00% | N/A |
| | Independent hold | Independent hold | Independent hold | Independent hold | Independent hold |

#### Counties that flipped from Independent to Republican

* Washington (largest city: Calais)

### By congressional district

King won both congressional districts, which both elected Democrats.
| District | King | Kouzounas | Costello | Representative |
| 1st | 55% | 30% | 12% | Chellie Pingree |
| 2nd | 49% | 40% | 9% | Jared Golden |