Mike Zimmer
Iowa State Senator, District 35 since 2025. Lost re-election in 2026; leaves office in January 2027. Ran in 1 election in 2025, winning 1.
Iowa State Senator, District 35Educator
- In office
- 1 yr
- Since 2025
- Bills became law
- 0
- 53 sponsored, 2025–2026 session
- Votes missed
- 2.0%
- Chamber median 2.9%
- With party
- 85%
- On votes splitting the parties
- Last margin
- −3.8
- Lost 2026
- Elections
- 2
- 2025–2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET
Committees
As of 2026-10.
- Agriculture · ranking member
- Education
- Health and Human Services
- Natural Resources and Environment
- Transportation
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
No bills in this list for the 2025–2026 session.
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Zimmer sits in the Iowa State Senate
Zimmer is closer to the center than 83% of the chamber's Democrats.
Closest: Zach Wahls, Izaah Knox, Matt Blake
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:49 PM ET
With Zimmer’s party
- Votes with the chamber's Democrats85%
Black tick: the average of Democrats in the Iowa State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Zimmer’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Zimmer | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Oct 2, 2026 | HF 2801: A bill for an act modifying the major economic growth attraction program, and including… | Yes | No | Yes | Passed 28–19 |
| May 2, 2026 | HF 2770: A bill for an act relating to and making appropriations to the justice system, providing… | Yes | No | Yes | Passed 29–17 |
| May 2, 2026 | HF 2787: A bill for an act prohibiting warrant resolution clinics, including enforcement… | Yes | No | Yes | Passed 31–12 |
| May 2, 2026 | SF 2490: A bill for an act relating to oil and gas production, including filing requirements, the… | No | No | Yes | Passed 35–11 |
| May 2, 2026 | HF 2781: A bill for an act relating to allocations of moneys from the juvenile detention home fund. | Yes | No | Yes | Passed 34–9 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Zimmer was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | Iowa State Senate, District 35 | Lost | R+3.8 | R+21.5 | +17.7 |
| 2025 | Iowa State Senate, District 35 (special) | Won | D+3.6 | R+21.5 | +25.1 |
Source: 99chambers results archive; 2026: Iowa Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $122.5K
- Spent
- $39.9K
Source: Iowa Ethics and Campaign Disclosure Board filings through May 26, 2026Updated Oct 31, 2026, 10:42 PM ET
Campaign committees
Open committees can still raise and spend money.
| mikezimmerforiowa State | Active |
Source: Iowa Ethics and Campaign Disclosure Board filings through May 26, 2026Updated Oct 31, 2026, 10:42 PM ET
Seats Zimmer has held
- Iowa State Senate, District 35 · since 2025
Source: 99chambers results archive
Who Zimmer has run against
- Joe Stutting (R) · 2026 election, lost
- Katie Whittington (R) · 2025 special election, won
Source: 99chambers results archive; 2026: Iowa Secretary of State (unofficial)
How we know Zimmer
One person, matched across every source we use.
- Open States ocd-person/93034bcb-c3fa-4427-8a1a-d48b8485a8eb
- Wikidata Q131930231
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:52 PM ET