# Mark Matthiesen

Mark Matthiesen is a Republican member of the Missouri House for district 107.

- Party: Republican
- Seat: Missouri House, district 107
- Serving since: 2023-01-04
- Current term: MO 2025–26 session
- Open States ID: ocd-person/661f49f4-e075-491e-aad8-4dde65ecb6df

Source: https://americaspoliticalpulse.com/p/661f49f4-e075-491e-aad8-4dde65ecb6df (America’s Political Pulse, Polarization Research Lab), data through 2026-10-27. Data under CC BY 4.0. Cite as: Westwood, Sean J., and Yphtach Lelkes. 2024. America's Political Pulse [data set].

## Headline

Matthiesen reported $9,250 in the 2026 cycle, in the bottom quarter of State House Republicans (median $33.7K).

## What Matthiesen says (MO 2025–26 session)

28 classified statements: 28 posts on X. Each rate is the share of statements with the label, against the State House Republicans average; rank 1 is the highest rate.

| Label | Matthiesen | State House Republicans average | Rank |
|---|---|---|---|
| Personal attacks | 3.6% | 2.9% | 212 of 791 |
| Policy criticism | 21.4% | 9.3% | 91 of 791 |
| Policy discussion | 32.1% | 31.9% | 369 of 791 |
| Bipartisanship | 0.0% | 1.8% | 677 of 791 |
| Credit claiming | 7.1% | 12.7% | 477 of 791 |
| Extreme labels | 0.0% | 1.4% | 618 of 791 |

Most discussed policy areas: Environmental Protection 33% (State House Republicans 1.9%); Immigration 22% (State House Republicans 4.7%); Taxation 22% (State House Republicans 8.1%); Agriculture and Food 11% (State House Republicans 4.4%); Commerce 11% (State House Republicans 3.9%).

## Ideology (CSIP)

CSIP score +0.47 (standard error 0.09), from 11 donors and 0 roll calls. Negative is left of 0, positive right of it, on one scale for every official. 69% of State House Republicans score lower.

## Legislation (MO 2025–26 session)

Sponsored 20 bills: 20 reached committee, 2 passed one chamber, 1 passed both, 0 became law. Cosponsored 3. 35.0% of sponsored bills got out of committee (Missouri House 32.2%; rank 72 of 150).

Recent sponsored bills:

- HB 1800: Changes the percentage of the cap on the inflationary growth factor for the assessment growth of real or personal property occurring within a political… (passed one chamber, 2026-03-23) https://openstates.org/mo/bills/2026/HB1800/
- HB 3332: Modifies provisions relating to employment benefits for first responders (in committee, 2026-04-01) https://openstates.org/mo/bills/2026/HB3332/
- HB 3342: Prohibits personal property tax levies passed prior to January 1, 1975, from applying to motor vehicles (in committee, 2026-03-05) https://openstates.org/mo/bills/2026/HB3342/
- HB 3305: Modifies provisions governing mental health efforts in public schools (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB3305/
- HB 3177: Establishes provisions relating to nuisance actions against racing facilities and race tracks (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB3177/
- HB 2883: Modifies the provisions of the "Show-Me Sports Investment Act" (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB2883/
- HB 2859: Reduces the assessment percentage of certain personal property and provides a personal property tax exemption for certain personal property upon adoption of a… (in committee, 2026-04-29) https://openstates.org/mo/bills/2026/HB2859/
- HB 2507: Prohibits labor organizations from collecting payment for union dues from a new employee until such employee has worked at least two hundred fifty hours (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB2507/
- HB 2528: Exempts portable solar generation devices from public service commission regulations (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB2528/
- HB 2506: Requires the office of childhood to design and develop placards that include a QR code containing a link to a child care facility's complaint investigations… (in committee, 2026-04-23) https://openstates.org/mo/bills/2026/HB2506/

## Campaign money (2026 cycle)

Itemized receipts $9,250 (State House Republicans median $33.7K). Aggregates only; no individual donors.

## Recent statements

Newest first. Posts on X are listed by date and link only.

- 2025-11-26 · Post on X · labels: personal attacks · https://x.com/MarkMattMO/status/1993823198337434018
- 2025-10-28 · Post on X · https://x.com/MarkMattMO/status/1983313634534269381
- 2025-10-26 · Post on X · https://x.com/MarkMattMO/status/1982493253619560733
- 2025-10-25 · Post on X · https://x.com/MarkMattMO/status/1982102258704667101
- 2025-10-23 · Post on X · https://x.com/MarkMattMO/status/1981332099824312655
- 2025-09-19 · Post on X · https://x.com/MarkMattMO/status/1968836585702543747
- 2025-09-01 · Post on X · labels: policy criticism, policy discussion · https://x.com/MarkMattMO/status/1962522366761742526
- 2025-09-01 · Post on X · labels: policy discussion · https://x.com/MarkMattMO/status/1962529755325944295
- 2025-08-17 · Post on X · https://x.com/MarkMattMO/status/1957171220882813072
- 2025-07-29 · Post on X · https://x.com/MarkMattMO/status/1950082417538322933

## Links

- Official site: https://house.mo.gov/MemberDetails.aspx?year=2024&code=R&district=107
- Campaign site: https://matthiesen4missouri.com/
- X: https://x.com/MarkMattMO
- Facebook: https://www.facebook.com/MarkRep70/
- Instagram: https://www.instagram.com/markmattmo/
- LinkedIn: https://www.linkedin.com/in/mark-matthiesen-6838541a3/

Full profile, with every chart and the methods: https://americaspoliticalpulse.com/p/661f49f4-e075-491e-aad8-4dde65ecb6df