Who funds Main Street Fund?

Its biggest reported donors in the 2026 cycle were Main Street Defense Fund ($2.1M), Securing American Greatness, Inc. ($1.0M), Farmers First Fund ($250K), Clinical Reference Laboratory Inc ($25K), out of $3.4M received from donors tracked here.

Which candidates did Main Street Fund spend the most on in 2026?

against Adam Hamilton (Kansas Senate, $4.8M, lost); for Roger Marshall (Kansas Senate, $28K, lost).

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Outside spender

Main Street Fund

FEC committee C00957928

Loser

Main Street Fund spent $4.8M on independent expenditures in the 2026 federal elections, and 100% of it helped Republicans (FEC filings through Oct 14, 2026). Counting dollars, not candidates, and only races already called, 0% ended up on the winning side ($0 won, $4.8M lost).

Outside spending

$4.8M

On the winning side

On the losing side

$4.8M

Supporting vs attacking

1% / 99%

$28K for, $4.8M against

Google says Main Street Fund also spent $206K on Google and YouTube ads this cycle (4% of its FEC-reported outside spending). All ad buyers →

Follow the money

Who filled the envelope

Main Street Fund reported $3.4M in gifts from people, companies, nonprofits and other PACs. The biggest are below.

All big donors →

Main Street Defense FundCompany / nonprofit$2.1M (62%)
Securing American Greatness, Inc.Dark money$1.0M (29%)
Farmers First FundCompany / nonprofit$250K (7%)
Clinical Reference Laboratory IncCompany / nonprofit$25K (1%)

Where the money went

Biggest targets, with whether each one paid off.

✓ Backed the winner or attacked the loser ✗ Backed the loser or attacked the winner Race not called yet Result not matched

Candidate	Race	Spending	Amount	Paid off?
Adam Hamilton	Kansas Senate	Attacking	$4.8M	✗ No
Roger Marshall	Kansas Senate	Supporting	$28K	✗ No

Questions people ask

How much did Main Street Fund spend in 2026, and did it win?: Main Street Fund spent $4.8M on independent expenditures in the 2026 federal elections, and 100% of it helped Republicans (FEC filings through Oct 14, 2026). Counting dollars, not candidates, and only races already called, 0% ended up on the winning side ($0 won, $4.8M lost).
Who funds Main Street Fund?: Its biggest reported donors in the 2026 cycle were Main Street Defense Fund ($2.1M), Securing American Greatness, Inc. ($1.0M), Farmers First Fund ($250K), Clinical Reference Laboratory Inc ($25K), out of $3.4M received from donors tracked here.
Which candidates did Main Street Fund spend the most on in 2026?: against Adam Hamilton (Kansas Senate, $4.8M, lost); for Roger Marshall (Kansas Senate, $28K, lost).