# Mike Costlow

Mike Costlow is a Republican member of the Missouri House for district 108.

- Party: Republican
- Seat: Missouri House, district 108
- Serving since: 2025-01-08
- Current term: MO 2025–26 session
- Open States ID: ocd-person/c08a9151-fdfe-4da9-97c2-5536ed96f255

Source: https://americaspoliticalpulse.com/p/c08a9151-fdfe-4da9-97c2-5536ed96f255 (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

100% of Costlow’s itemized money in the 2026 cycle came from Missouri, in the top quarter of State House Republicans.

## Ideology (CSIP)

CSIP score +0.43 (standard error 0.07), from 34 donors and 0 roll calls. Negative is left of 0, positive right of it, on one scale for every official. 64% of State House Republicans score lower.

## Legislation (MO 2025–26 session)

Sponsored 48 bills: 48 reached committee, 3 passed one chamber, 0 passed both, 0 became law. Cosponsored 26. 18.8% of sponsored bills got out of committee (Missouri House 32.2%; rank 100 of 150).

Recent sponsored bills:

- HB 1730: Modifies provisions relating to firearm suppressors (passed one chamber, 2026-05-04) https://openstates.org/mo/bills/2026/HB1730/
- HB 2658: Modifies provisions relating to electronic communications (passed one chamber, 2026-04-08) https://openstates.org/mo/bills/2026/HB2658/
- HB 3481: Modifies Supreme Court Rule 33.01 relating to conditions of release from custody in criminal proceedings (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB3481/
- HB 3375: Modifies provisions relating to eminent domain (in committee, 2026-03-25) https://openstates.org/mo/bills/2026/HB3375/
- HB 3364: Creates new provisions for industrial utility users (in committee, 2026-03-30) https://openstates.org/mo/bills/2026/HB3364/
- HB 3351: Creates provisions for detachment from a water district for certain customers in certain circumstances (in committee, 2026-04-23) https://openstates.org/mo/bills/2026/HB3351/
- HB 3315: Establishes provisions regulating the display of flags at public buildings (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB3315/
- HB 3292: Establishes the "Motivational Boot Camp Incarceration Program" in the department of corrections and allows certain persons to be sentenced to the program (in committee, 2026-04-09) https://openstates.org/mo/bills/2026/HB3292/
- HB 3214: Creates the Manufacturing Opportunity Zones Act for large manufacturing developments with access to transportation and proximity to electricity, gas, and water (in committee, 2026-05-15) https://openstates.org/mo/bills/2026/HB3214/
- HB 3176: Establishes the Missouri declaration and bylaws modernization act (in committee, 2026-04-08) https://openstates.org/mo/bills/2026/HB3176/

## Campaign money (2026 cycle)

Itemized receipts $59.6K (State House Republicans median $33.7K). 100% of itemized individual money came from in state. Aggregates only; no individual donors.

## Links

- Official site: https://house.mo.gov/memberdetails.aspx?district=108&year=2025&code=R
- Campaign site: https://costlowformissouri.com/
- Facebook: https://www.facebook.com/profile.php?id=61558387177043
- Facebook: https://www.facebook.com/profile.php?id=100090935517564
- LinkedIn: https://www.linkedin.com/in/mikecostlow2/

Full profile, with every chart and the methods: https://americaspoliticalpulse.com/p/c08a9151-fdfe-4da9-97c2-5536ed96f255