# Mark Baisley

Mark Baisley is a Republican member of the Colorado Senate for district 4.

- Party: Republican
- Seat: Colorado Senate, district 4
- Serving since: 2023-01-09
- Current term: CO 2025–26 session
- Open States ID: ocd-person/b4002b84-79a0-481a-94a8-00136c2dabb6

Source: https://americaspoliticalpulse.com/p/b4002b84-79a0-481a-94a8-00136c2dabb6 (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

73% of the 45 bills Baisley sponsored got out of committee, the lowest of 35 in the Colorado Senate.

## Ideology (CSIP)

CSIP score +0.61 (standard error 0.02), from 267 donors and 1,173 roll calls. Negative is left of 0, positive right of it, on one scale for every official. 84% of State Senate Republicans score lower.

## Votes (CO 2025–26 session)

1,666 roll calls. Attendance 98.3% (Colorado Senate 97.2%). Party unity 96.2% (94.2%). 288 votes against the party majority.

Key votes:

- 2026-05-13 · voted yea · CONCUR · SB 187 Establishing Commission on Medicaid · pass · https://openstates.org/co/bills/2026A/SB187/
- 2026-05-13 · voted nay · BILL · HB 1425 Applied Behavior Analysis Services · pass · https://openstates.org/co/bills/2026A/HB1425/
- 2026-05-13 · voted nay · REPASS · SB 42 Revenue Classification Taxpayers Bill of Rights · pass · https://openstates.org/co/bills/2026A/SB42/
- 2026-05-13 · voted nay · BILL · HB 1141 Discriminatory Practices in Public Schools · pass · https://openstates.org/co/bills/2026A/HB1141/
- 2026-05-13 · voted yea · CONCUR · SB 78 Changes to Institutions of Higher Education Statutes · pass · https://openstates.org/co/bills/2026A/SB78/
- 2026-05-13 · voted nay · BILL · HB 1309 Abuse in Cases of Separation · pass · https://openstates.org/co/bills/2026A/HB1309/
- 2026-05-13 · voted yea · REPASS · SB 165 Species Conservation Measures · pass · https://openstates.org/co/bills/2026A/SB165/
- 2026-05-13 · voted yea · CONCUR · SB 115 Post-Conviction Relief for Certain Offenders · pass · https://openstates.org/co/bills/2026A/SB115/
- 2026-05-13 · voted yea · AMEND (L.081) · HB 1289 Modification of Certain Tax Expenditures · pass · https://openstates.org/co/bills/2026A/HB1289/
- 2026-05-13 · voted yea · CONCUR · SB 3 End-of-Life Management of Electric Vehicle Batteries · pass · https://openstates.org/co/bills/2026A/SB3/

## Legislation (CO 2025–26 session)

Sponsored 45 bills: 35 reached committee, 23 passed one chamber, 20 passed both, 17 became law. Cosponsored 126. 73.3% of sponsored bills got out of committee (Colorado Senate 94.3%; rank 35 of 35).

Recent sponsored bills:

- SB 189: Automated Decision-Making Technology (became law, 2026-05-14) https://openstates.org/co/bills/2026A/SB189/
- SB 185: Enhance Security of Office of Information Technology (became law, 2026-06-02) https://openstates.org/co/bills/2026A/SB185/
- SB 186: Update Workers' Compensation Statutes Allow Electronic Filing (became law, 2026-06-02) https://openstates.org/co/bills/2026A/SB186/
- HCR 1004: Person's Rights Related to Their Children (in committee, 2026-04-20) https://openstates.org/co/bills/2026A/HCR1004/
- SR 3: Designate March Arts Education Month (passed one chamber, 2026-03-03) https://openstates.org/co/bills/2026A/SR3/
- HB 1250: Procedures Related to Civil Asset Forfeiture (became law, 2026-06-04) https://openstates.org/co/bills/2026A/HB1250/
- HB 1230: Extend Conservation Easement Tax Credit (became law, 2026-06-01) https://openstates.org/co/bills/2026A/HB1230/
- HB 1238: Designating Emergency Medical Services Essential Services (became law, 2026-05-05) https://openstates.org/co/bills/2026A/HB1238/
- HB 1205: Colorado State Forest Service Good Neighbor Authority (became law, 2026-04-13) https://openstates.org/co/bills/2026A/HB1205/
- SB 89: Recreate Wildfire Matters Interim Committee (in committee, 2026-05-14) https://openstates.org/co/bills/2026A/SB89/

## Campaign money (2026 cycle)

Itemized receipts $975 (State Senate Republicans median $46.2K). 97% of itemized individual money came from in state. Aggregates only; no individual donors.

## Links

- Official site: https://leg.colorado.gov/legislators/mark-baisley
- Campaign site: https://markbaisley.com/
- Facebook: https://www.facebook.com/mark.baisley
- LinkedIn: https://www.linkedin.com/in/mark-baisley-7946595/

Full profile, with every chart and the methods: https://americaspoliticalpulse.com/p/b4002b84-79a0-481a-94a8-00136c2dabb6