Tim Mathern
North Dakota State Senator, District 11 since 1990. Ran for re-election in 2026; the count goes on.
- In office
- 36 yrs
- Since 1990
- Bills became law
- 1
- 10 sponsored, 2025–2026 session
- Votes missed
- 0.1%
- Chamber median 1.2%
- With party
- 91%
- On votes splitting the parties
- Last margin
- +24.5
- Won 2018
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET
Committees
As of 2026-10.
- Tribal and State Relations · vice chair
- Advanced Nuclear Energy
- Appropriations
- Appropriations: Human Resources Division
- Budget Section
- Budget Section Human Resources Division
- Committee on Committees
- Delayed Bills
- Health Care
- Rural Health Transformation
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Became law Apr 2025
Failed in the House Apr 2025
Failed in the House Mar 2025
Failed in the Senate Sep 2026
Failed in the Senate Feb 2025
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Mathern sits in the North Dakota State Senate
Mathern is closer to the center than 40% of the chamber's Democrats.
Closest: Ryan Braunberger, Kathy Hogan,
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:56 PM ET
With Mathern’s party
- Votes with the chamber's Democrats91%
- Cosponsorships of the other party's bills70%
Black tick: the average of Democrats in the North Dakota State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Mathern’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Mathern | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Jan 23, 2026 | HB 1624: A BILL for an Act to create and enact two new sections to chapter 15.1-07 of the North… | Yes | Yes | No | Failed 22–24 |
| May 3, 2025 | HB 1459: AN ACT to create and enact a new section to chapter 38-12 of the North Dakota Century… | No | No | Yes | Passed 27–19 |
| Apr 25, 2025 | HB 1143: AN ACT to provide an appropriation to the agriculture commissioner for a food… | Yes | Yes | Yes | Passed 36–9 |
| Apr 22, 2025 | HB 1015: AN ACT to provide an appropriation for defraying the expenses of the various divisions… | Yes | No | Yes | Failed 23–24 |
| Apr 18, 2025 | HB 1298: AN ACT to amend and reenact sections 39-06.1-06, 39-09-02, 39-09-04, and 39-09-07.1, and… | Yes | Yes | Yes | Passed 25–21 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Mathern 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 | North Dakota Legislative District 11 | Counting | D+26.1 | D+11.9 | +14.2 |
| 2022 | North Dakota State Senate, District 11 | Won | — | — | — |
| 2018 | North Dakota State Senate, District 11 | Won | D+24.5 | — | — |
| 2016 | North Dakota Treasurer | Lost | R+33.7 | — | — |
| 2014 | North Dakota State Senate, District 11 | Won | — | — | — |
| 2014 | North Dakota State Senate, District 11 (primary) | Won | — | — | — |
| 2010 | North Dakota State Senate, District 11 | Won | — | — | — |
| 2008 | Governor of North Dakota | Lost | R+52.0 | — | — |
| 2006 | North Dakota State Senate, District 11 | Won | D+35.9 | — | — |
| 2002 | North Dakota State Senate, District 11 | Won | D+26.7 | — | — |
| 1998 | North Dakota State Senate, District 11 | Won | D+10.5 | — | — |
| 1994 | North Dakota State Senate, District 11 | Won | D+5.1 | — | — |
| 1990 | North Dakota State Senate, District 51 | Won | D+8.2 | — | — |
| 1986 | North Dakota State Senate, District 51 | Won | D+1.6 | — | — |
| 1984 | North Dakota House of Representatives, District 51 | Lost | R+1.0 | — | — |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $16.9K
- Spent
- $2.4K
Source: North Dakota Secretary of State filings through Sep 29, 2026Updated Nov 1, 2026, 7:46 AM ET
Campaign committees
Open committees can still raise and spend money.
| Mathern for Senate State | Active |
Source: North Dakota Secretary of State filings through Sep 29, 2026Updated Nov 1, 2026, 7:46 AM ET
Seats Mathern has held
- North Dakota State Senate, District 11 · since 1994
- North Dakota State Senate, District 51 · since 1990
Source: 99chambers results archive
Who Mathern has run against
- Christine O'Riley (R) · 2026 general
- Todd McMichael (R) · 2018 election, won
- Kelly L. Schmidt (R) · 2016 election, lost
- John Hoeven (R) · 2008 election, lost
- Daniel Narloch (R) · 2006 election, won
- Ron Lawler (I) · 2002 election, won
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Mathern
One person, matched across every source we use.
- Open States ocd-person/f715b93a-dcf7-4a67-b466-10c2cfad8a60
- Wikidata Q7803906
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:52 PM ET