👤 About David Costello
David Costello is a Democratic candidate for U.S. Senate in Maine’s 2026 federal election cycle. The campaign committee, COSTELLO FOR U.S. SENATE, is registered in BRUNSWICK, ME, with COSTELLO, JEANNE listed as treasurer. The campaign has not yet reported substantial fundraising in current FEC filings. The race’s incumbent is Republican Susan Collins.
Bio auto-generated from candidate filings.
🔗 Where to learn more
💰 Campaign finance
No FEC filings reported yet for the 2026 cycle.
🏁 The race for U.S. Senate
DC
David Costello VIEWING
Democrat
17 candidates have filed with the FEC for this race.
NONPARTISAN · SOURCED FROM CONGRESS.GOV, OPENFEC, SENATE & HOUSE CLERKS · UPDATED REGULARLY
2026 candidate profile
David Costello
Democrat · Challenger
Running for: Maine U.S. Senate
FEC pending
Total raised
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Cash on hand
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Spent
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FEC status
Biography
David Costello is a Democratic candidate for U.S. Senate in Maine’s 2026 federal election cycle. The campaign committee, COSTELLO FOR U.S. SENATE, is registered in BRUNSWICK, ME, with COSTELLO, JEANNE listed as treasurer. The campaign has not yet reported substantial fundraising in current FEC filings. The race’s incumbent is Republican Susan Collins.
Compiled from public FEC filings and race data. A detailed profile is being expanded.
FEC filing
FEC IDS4ME00113
OfficeMaine U.S. Senate
PartyDemocrat
See the full race
View every candidate, all fundraising totals, and the primary results for the Maine U.S. Senate race.
🗳 2026 Election
U.S. Senate — Maine
Primary: Jun 9, 2026 (2 months ago)
· General: November 3, 2026
Ranked-choice tabulation may apply.