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David Costello

DChallenger
Candidate for Maine U.S. Senate Seat (Class II) · Election Jun 9, 2026
OverviewFundraisingNewsCampaignsPositionsInterviewEndorsementsCommunications

Fundraising

Raised $154K in the 2026 cycle. Source: FEC candidate summary.

FEC summary snapshot· as of Aug 26, 2026
Total Raised
$154K
Total Spent
$154K
Cash on Hand
$0
Debt
$0
The 2026 Race
View Full Race →

21 candidates filed, 2 active for the 2026 Senate election in Maine. Party primary on Jun 9, 2026. General election on Nov 3, 2026. FEC Race ID: SME002026.

Market (kalshi): R 45% · D 55%Rating: 270toWin · 2026-10-02
Primary
Jun 9, 2026
General
Nov 3, 2026
Candidates
2 active / 21 filed
Total Raised
$53.5M
Outside Spending
$75.9M
Total Spent
$41.7M
Cash on Hand
$13.1M
Incumbent
Susan M. CollinsR

Past Campaigns

FEC campaign-finance filings on record for 1 cycle (2026), totaling $154K raised.

Cycles
1
Total Raised
$154K
Latest Cycle
2026
Candidate-provided Public data (FEC) AllCiv / Legis1 coverage
Costello
for Senate
Your actions
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Links
costelloforsenate.com
FEC: S4ME00113

Election History

Most recent general-election winners
2020
Susan Margaret CollinsR
417,645 votes
2014
Susan M. CollinsR
413,505 votes
2008
Susan M. CollinsR
444,300 votes
2002
Susan M. CollinsR
295,041 votes
1996
Susan M. CollinsR
298,422 votes
1990
William S. CohenR
319,167 votes
1984
William S. CohenR
404,414 votes
1978
William S. CohenR
212,294 votes