Candidates / David Costello
David Costello
D
Challenger
Eliminated in primary Toss-up Maine · Running for U.S. Senate
David Costello is a Democratic candidate for U.S. Senate in Maine in 2026. The primary was held on June 9, 2026. Costello has raised $40K this cycle, with 87% from individual donors, according to FEC filings. Forecasters rate the race a toss-up.
Fundraising Snapshot
$40K
Total Contributions
$96K
Spent
$0
Cash on Hand
Where the money comes from
Individual $34K (87%)
PAC $0 (0%)
Other (13%)
Donation sizes
$200 & under
$16K
$200–$499
$3K
$500–$999
$2K
$1K–$1,999$0
$2,000+
$14K
Small-dollar (≤$499): 55%Large-dollar (≥$1K): 41%
In-state vs out-of-state
In-state $10K (52%)
Out-of-state $9K (48%)
What do these terms mean?
- Total Contributions — Money contributed directly by individuals, PACs, and party committees.
- Individual — Contributions from individual people, including small-dollar donations under $200.
- PAC — Contributions from Political Action Committees (organizations that pool donations).
- Party — Contributions from Democratic or Republican party committees.
- Other — Remaining contributions not categorized above.
- Transfers In — Money moved from the candidate's other campaign committees (e.g., a House campaign fund transferred to a Senate campaign). Not a new contribution.
View on FEC.gov
As of May 2026
Why this race matters: Blue-leaning state with a long-serving Republican incumbent. Collins won in 2020 but Maine has trended Democratic in recent presidential elections.
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