2024 United States Senate election in Maine

Not to be confused with 2024 Maine State Senate election.

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.^[1]

2024 United States Senate election in Maine

← 2018 November 5, 2024 2030 →

Candidate Angus King Demi Kouzounas David Costello Party Independent Republican Democratic Popular vote 427,279 284,328 88,871 Percentage 52.06% 34.64% 10.83%

County results Municipality results Congressional district results King:      30–40%      40–50%      50–60%      60–70%      70–80%      >90% Kouzonunas:      40–50%      50–60%      60–70%      70–80%      80–90%      >90% Costello:      80–90% Tie:      40–50%      50%

U.S Senator before election Angus King Independent Elected U.S Senator Angus King Independent

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^[2]
• Angus King, incumbent U.S. senator^[3]

Endorsements

Angus King

U.S. Senators

• Joe Manchin, former U.S. senator from West Virginia (2010–2025) (Independent; Democratic until 2024)^[4]

Labor unions

• AFL-CIO^[5]

Organizations

• American Israel Public Affairs Committee (AIPAC)^[6]
• Feminist Majority PAC^[7]
• International Franchise Association^[8]
• Jewish Democratic Council of America^[9]
• J Street PAC^[10]
• League of Conservation Voters^[11]
• Planned Parenthood Action Fund^[12]
• Population Connection Action Fund^[13]

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[14]

Republican primary

Candidates

Nominee

• Demitroula "Demi" Kouzounas, former chair of the Maine Republican Party^[15]

Endorsements

Demitroula "Demi" Kouzounas

U.S. representatives

• Bruce Poliquin, Former U.S. Representative (2015–2019)^[16]

Governors

• Paul LePage, Former Governor of Maine (2011–2019)^[17]

Fundraising

Campaign finance reports as of May 22, 2024
Candidate	Raised	Spent	Cash on hand
Demi Kouzounas (R)	$300,712[a]	$55,731	$244,980
Source: Federal Election Commission[14]

Results

Republican primary results^[18]

Party		Candidate	Votes	%
	Republican	Demi Kouzounas	58,832	100.0%
Total votes			58,832	100.0%

Democratic primary

Candidates

Nominee

• David Costello, consultant and former deputy secretary of the Maryland Department of the Environment^[19]

Withdrawn

• Natasha Alcala, fashion designer^[20]

Fundraising

Campaign finance reports as of May 22, 2024
Candidate	Raised	Spent	Cash on hand
David Costello (D)	$72,408[b]	$13,302	$59,424
Source: Federal Election Commission[14]

Results

Democratic primary results^[18]

Party		Candidate	Votes	%
	Democratic	David Costello	54,537	100.0%
Total votes			54,537	100.0%

General election

Predictions

Source	Ranking	As of
The Cook Political Report[21]	Solid I	November 9, 2023
Inside Elections[22]	Solid I	November 9, 2023
Sabato's Crystal Ball[23]	Safe I	September 5, 2024
Decision Desk HQ/The Hill[24]	Safe I	October 11, 2024
Elections Daily[25]	Safe I	May 4, 2023
CNalysis[26]	Solid I	November 21, 2023
RealClearPolitics[27]	Solid I	August 5, 2024
Split Ticket[28]	Safe I	October 23, 2024
538[29]	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[c]	$170,805	$333,192
David Costello (D)	$109,637[d]	$24,063	$85,894
Jason Cherry (I)	$110,000[e]	$95,478	$6,011
Source: Federal Election Commission[14]

Polling

Poll source	Date(s) administered	Sample size[f]	Margin of error	Angus King (I)	Demi Kouzounas (R)	David Costello (D)	Other	Undecided
University of New Hampshire[30]	October 29 - November 2, 2024	1,485 (LV)	± 2.4%	50%	35%	7%	1%[g]	6%
SurveyUSA[31][A]	October 24–29, 2024	1,079 (LV)	± 3.6%	54%	28%	8%	3%[h]	8%
Pan Atlantic Research[32]	September 5–15, 2024	812 (LV)	± 3.5%	53%	23%	8%	1%[i]	16%
University of New Hampshire[33]	August 15–19, 2024	951 (LV)	± 3.2%	43%	33%	9%	4%[j]	12%
Digital Research[34]	April 8–30, 2024	609 (RV)	± 4.0%	57%	28%	12%	–	3%

Results

2024 United States Senate election in Maine^[35]

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			820,782	100.00%	N/A
	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.^[36]

District	King	Kouzounas	Costello	Representative
1st	55%	30%	12%	Chellie Pingree
2nd	49%	40%	9%	Jared Golden

Notes

1. $154,001 of this total was self-funded by Kouzounas
2. $50,000 of this total was self-funded by Costello
3. $314,001 of this total was self-funded by Kouzounas
4. $77,000 of this total was self-funded by Costello
5. $55,000 of this total was self-funded by Cherry
6. Key:
   A – all adults
   RV – registered voters
   LV – likely voters
   V – unclear
7. Cherry (I) with 1%
8. Cherry (I) with 3%
9. Cherry (I) with 1%
10. Cherry (I) with 3%; "Another candidate" with 1%

Partisan clients

1. Poll sponsored by Bangor Daily News and FairVote