Iowa 3rd District

Lean D Cook Political Report, as of October 16, 2026

Incumbent: Zach Nunn (R). Data pulled from the FEC on October 20, 2026.

Campaigns through 2026-09-30Outside money through 2026-10-18Source: FEC

The short version

Sarah Trone Garriott has raised $7.7M to Zach Nunn's $6.0M (1.3x), through September 30, 2026.
Outside groups have reported $6.0M in general election spending: $4.1M helping the Democrat and $1.9M helping the Republican.
Largest outside spender: HMP, $1.6M opposing Zach Nunn.

Campaign money
Outside spending
Where it came from
Top PAC donors

Campaign money

D Democrat

Sarah Trone Garriott

Raised: $7.7M
Spent: $5.7M
Cash on hand: $2.0M
From PACs: $595K
From individuals: $6.9M
Self funding: $120
Outside money for (general): $4.1M

Campaign totals through September 30, 2026.

R Republican

Zach Nunn

Raised: $6.0M
Spent: $4.6M
Cash on hand: $1.4M
From PACs: $2.1M
From individuals: $1.3M
Self funding: $0
Outside money for (general): $1.9M

Campaign totals through September 30, 2026.

Outside spending

$6.0MGeneral election independent expenditures in this raceFEC 24 and 48 hour notices, through October 18, 2026

$4.1MSpent to help Sarah Trone Garriott in the general (supporting them or opposing their opponent)

$1.9MSpent to help Zach Nunn in the general (supporting them or opposing their opponent)

Biggest outside spenders, general election

Spender	Position	Amount	FEC ID
HMP	Oppose Zach Nunn	$1.6M	C00495028
No Going Back PAC Inc.	Oppose Sarah Trone Garriott	$1.3M	C00960435
American Federation of State County & Municipal Employees P E O P L E	Oppose Zach Nunn	$604K	C00011114
Project 218	Support Sarah Trone Garriott	$498K	C00871368
Elect Democratic Women	Oppose Zach Nunn	$349K	C00685297
NRDC Action Votes	Oppose Zach Nunn	$300K	C00740225
LCV Victory Fund	Oppose Zach Nunn	$250K	C00486845
Cffe PAC	Support Sarah Trone Garriott	$245K	C00744920
America PAC	Oppose Sarah Trone Garriott	$220K	C00879510
No Going Back PAC Inc.	Support Zach Nunn	$94K	C00960435
Progressive Turnout Project	Support Sarah Trone Garriott	$83K	C00580068
National Association of Realtors Political Action Committee	Support Zach Nunn	$62K	C00030718
Cffe PAC	Oppose Zach Nunn	$56K	C00744920
MAGA Inc.	Oppose Sarah Trone Garriott	$51K	C00892471
AB PAC	Support Sarah Trone Garriott	$37K	C00492140

Where the outside money came from

For the biggest spenders, the money is followed upstream while a single donor supplied at least half of it. From FEC receipts.

Project 218 ← $5.9M from Democracy Matters (50% of its reported receipts) No donor disclosure
NRDC Action Votes ← $3.1M from NRDC Action Fund (100% of its reported receipts) No donor disclosure
LCV Victory Fund ← $18.0M from League of Conservation Voters, Inc. (58% of its reported receipts) No donor disclosure
Cffe PAC ← $2.0M from Pivotal Ventures (55% of its reported receipts) No donor disclosure

The Gap

These totals come from the 24 and 48 hour notices outside groups must file before ads run. They are the disclosed floor. Spending by groups that do not file independent expenditure notices, such as issue ads paid for by 501(c)(4) groups, does not appear here.

Top PAC donors to each campaign

D Sarah Trone Garriott

PAC	Given	Checks
Machinists Non Partisan Political League of the International Association of Machinists & Aerospace Workers	$10K	2
UAW - V - Cap (UAW Voluntary Community Action Program) 'Int'l Union United Automobile Aerospace & Agricultural Implement Workers of America UAW	$10K	2
Ca Luv PAC (California Leadership United for Victory PAC)	$10K	2
Moms Fed Up	$10K	2
HMP	$10K	2
Flip the Congress PAC	$10K	3
No Surrender Fund	$10K	2
International Association of Sheet Metal, Air, Rail and Transportation Workers Political Action League	$10K	2
Democracy Summer Leadership PAC	$10K	2
Carpenters Legislative Improvement Committee United Brotherhood of Carpenters and Joiners	$10K	2

Itemized PAC contributions processed by the FEC through June 30, 2026. 110 PACs in total.

R Zach Nunn

PAC	Given	Checks
Morgan Stanley Political Action Committee	$10K	5
The Capital Group Companies Inc Political Action Committee	$10K	4
Conservative Opportunity Leadership and Enterprise PAC	$10K	3
Waterpac - National Rural Water Association Political Committee	$10K	2
Pa-First PAC	$10K	2
Call to Service PAC	$10K	2
National Apartment Association Political Action Committee	$10K	4
Deloitte Political Action Committee	$10K	4
Nationwide Mutual Insurance Company Financial & Investments Political Action Committee	$10K	5
Itc Holdings Corp. PAC (Itc PAC)	$10K	4

Itemized PAC contributions processed by the FEC through June 30, 2026. 455 PACs in total.

Next raceCalifornia 48th District →

Primary Sources

FEC candidate page, Sarah Trone Garriott: fec.gov/data/candidate/H6IA03268
FEC committee filings, Sarah Trone Garriott principal campaign committee: C00904086
FEC candidate page, Zach Nunn: fec.gov/data/candidate/H2IA03119
FEC committee filings, Zach Nunn principal campaign committee: C00784389
FEC independent expenditures, 2026 cycle: fec.gov independent expenditures
Race rating: Cook Political Report, October 16, 2026
Nominees: www.iowapublicradio.org