# Brian Mulder

Brian Mulder is a Republican member of the South Dakota House for district 11.

- Party: Republican
- Seat: South Dakota House, district 11
- Serving since: 2023-01-10
- Current term: SD 2025–26 session
- Open States ID: ocd-person/d9d8a84f-96df-4dbf-b638-d63e216166d4

Source: https://americaspoliticalpulse.com/p/d9d8a84f-96df-4dbf-b638-d63e216166d4 (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

60% of Mulder’s itemized money in the 2024 cycle came from South Dakota, in the bottom quarter of State House Republicans.

## Ideology (CSIP)

CSIP score +0.12 (standard error 0.01), from 16 donors and 598 roll calls. Negative is left of 0, positive right of it, on one scale for every official. 15% of State House Republicans score lower.

## Votes (SD 2025–26 session)

640 roll calls. Attendance 99.6% (South Dakota House 96.6%). Party unity 71% (76%). 71 votes against the party majority.

Key votes:

- 2026-03-12 · voted yea · Do Pass Amended · SB 78 revise the General Appropriations Act for fiscal year 2026. · pass · https://openstates.org/sd/bills/2026/SB78/
- 2026-03-12 · voted yea · Do Pass Amended · HB 1051 revise property tax levies for school districts and to revise the state aid to general and special education formulas. · pass · https://openstates.org/sd/bills/2026/HB1051/
- 2026-03-12 · voted yea · Do Pass · HB 1326 appropriate money for the ordinary expenses of the legislative, judicial, and executive departments of the state, the current expenses of state… · pass · https://openstates.org/sd/bills/2026/HB1326/
- 2026-03-09 · voted yea · Do Pass Amended · SB 219 require that a state agency consult with the Aeronautics Commission prior to purchasing, transferring, or disposing of a state owned and operated… · pass · https://openstates.org/sd/bills/2026/SB219/
- 2026-03-09 · voted nay · Do Pass Amended · SB 245 create the homeowner property tax reduction fund, and to transfer moneys to the homeowner property tax reduction fund. · pass · https://openstates.org/sd/bills/2026/SB245/
- 2026-03-09 · voted yea · Do Pass Amended · SB 221 regulate the retail sale of nicotine products, and to provide a penalty therefor. · pass · https://openstates.org/sd/bills/2026/SB221/
- 2026-03-09 · voted yea · Do Pass Amended · SB 222 make an appropriation for eligible water, wastewater, storm water, and riparian buffer initiative projects and to declare an emergency. · pass · https://openstates.org/sd/bills/2026/SB222/
- 2026-03-09 · voted yea · Do Pass Amended · SB 119 create the capitol restoration fund and to transfer moneys thereto. · pass · https://openstates.org/sd/bills/2026/SB119/
- 2026-03-09 · voted yea · Do Pass Amended · SB 106 modify the amount required to be set aside for extraordinary expenses incurred in providing special education programs. · pass · https://openstates.org/sd/bills/2026/SB106/
- 2026-03-09 · voted yea · Do Pass Amended · SB 102 modify the distribution of gaming revenues. · pass · https://openstates.org/sd/bills/2026/SB102/

## Legislation (SD 2025–26 session)

Sponsored 34 bills: 32 reached committee, 23 passed one chamber, 20 passed both, 16 became law. Cosponsored 0. 91.2% of sponsored bills got out of committee (South Dakota House 81.4%; rank 13 of 69).

Recent sponsored bills:

- SB 221: regulate the retail sale of nicotine products, and to provide a penalty therefor. (became law, 2026-03-30) https://openstates.org/sd/bills/2026/SB221/
- HB 1250: revise the types of community-based providers for purposes of state funded services. (became law, 2026-03-30) https://openstates.org/sd/bills/2026/HB1250/
- HB 1251: create the community-based providers methodology supplement fund, create the target teacher salary supplement fund, and provide for the transfer of certain… (in committee, 2026-02-23) https://openstates.org/sd/bills/2026/HB1251/
- HB 1244: repeal the special donations fund and make an appropriation to the Department of Education for the provision of a grant to support the Jobs for America's… (became law, 2026-03-30) https://openstates.org/sd/bills/2026/HB1244/
- HB 1220: regulate the sale of nicotine products, and to provide a penalty therefor. (became law, 2026-03-30) https://openstates.org/sd/bills/2026/HB1220/
- HB 1099: reschedule the pharmaceutical composition of crystalline polymorph psilocybin in a drug product approved by the Food and Drug Administration as a Schedule IV… (became law, 2026-03-10) https://openstates.org/sd/bills/2026/HB1099/
- HB 1104: revise the application requirements for special license plates and parking permits for individuals with disabilities. (became law, 2026-03-04) https://openstates.org/sd/bills/2026/HB1104/
- HB 1085: establish provisions for the coverage of nonopioid prescription drugs. (in committee, 2026-01-29) https://openstates.org/sd/bills/2026/HB1085/
- HB 1086: make an appropriation for providing a grant to a nonprofit that delivers programming to support offenders and correctional staff. (passed both chambers, 2026-03-02) https://openstates.org/sd/bills/2026/HB1086/
- HB 1097: make an appropriation for providing a grant to a nonprofit that delivers diversion programming. (in committee, 2026-02-12) https://openstates.org/sd/bills/2026/HB1097/

## Campaign money (2024 cycle)

Itemized receipts $38.1K (State House Republicans median $10.7K). 60% of itemized individual money came from in state. Aggregates only; no individual donors.

## Links

- Official site: https://sdlegislature.gov/Legislators/Profile/4534/Detail
- Campaign site: https://mulder4sd11.com/
- X: https://x.com/MulderBrian
- X: https://x.com/mulder4sd11
- Facebook: https://www.facebook.com/brian.mulder.923
- Facebook: https://www.facebook.com/mulder4sdhouse11/
- Instagram: https://www.instagram.com/brian_mulder/
- LinkedIn: https://www.linkedin.com/in/brian-mulder-2a12821b0/

Full profile, with every chart and the methods: https://americaspoliticalpulse.com/p/d9d8a84f-96df-4dbf-b638-d63e216166d4