Devin LeMahieu
Wisconsin State Senator, District 9 since 2014. Did not run for re-election in 2026; leaves office in January 2027.
- In office
- 12 yrs
- Since 2014
- Bills became law
- 1
- 14 sponsored, 2025–2026 session
- Votes missed
- 0.0%
- Chamber median 0.0%
- With party
- 100%
- On votes splitting the parties
- Last margin
- +17.0
- Won 2018
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Organization · chair
- Employment Relations
- Legislative Council
- Legislative Organization
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 LeMahieu sits in the Wisconsin State Senate
LeMahieu is closer to the center than 28% of the chamber's Republicans.
Closest: John Jagler, Cory Tomczyk, Jesse James
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:09 PM ET
With LeMahieu’s party
- Votes with the chamber's Republicans100%
- Cosponsorships of the other party's bills44%
Black tick: the average of Republicans in the Wisconsin State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: LeMahieu’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | LeMahieu | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| Mar 17, 2026 | AB 248: Relating to: vacancies in appointive state offices. | Yes | Yes | No | Passed 17–16 |
| Mar 17, 2026 | AB 595: Relating to: compliance with the federal Help America Vote Act, voter registration data… | Yes | Yes | No | Passed 18–15 |
| Mar 17, 2026 | AB 461: Relating to: an income tax subtraction for certain overtime compensation. (FE) | Yes | Yes | No | Passed 21–12 |
| Mar 17, 2026 | AB 1034: Relating to: name, image, and likeness rights for University of Wisconsin System student… | Yes | Yes | No | Passed 17–16 |
| Mar 17, 2026 | AB 601: Relating to: excluding certain event or sports wagers from the definition of “bet”. | Yes | Yes | Yes | Passed 21–12 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time LeMahieu 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 |
|---|---|---|---|
| 2022 | Wisconsin State Senate, District 9 | Won | — |
| 2018 | Wisconsin State Senate, District 9 | Won | R+17.0 |
| 2014 | Wisconsin State Senate, District 9 | Won | R+20.0 |
Source: 99chambers results archive
Seats LeMahieu has held
- Wisconsin State Senate, District 9 · since 2014
Source: 99chambers results archive
Who LeMahieu has run against
- Kyle Whelton (D) · 2018 general, won
- Martha Laning (D) · 2014 general, won
Source: 99chambers results archive
How we know LeMahieu
One person, matched across every source we use.
- Open States ocd-person/be7a6f06-6d2c-49d1-908d-451adef564eb
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET