Missouri Senate · District 3
Mike Henderson
Where they sit
Every current senator, placed from most liberal to most conservative by how they voted on contested bills.
Mike Henderson's seat is marked. Seats run from most liberal (left) to most conservative (right), by contested floor votes. Color shows how often each member crosses party lines toward the middle on votes that divide the parties: solid blue or red means almost never, and purple means on at least 1 in 5 of those votes. Gray seats are members too new to score. How these numbers work
The scores
How these numbers work →Each tick is a current senator, by party; the dot is Mike Henderson.
Each tick is a current senator, by party; the dot is Mike Henderson.
Bills
The bills Mike Henderson sponsored this term and how far they got. Co-sponsors aren’t counted.
| Bills | |
|---|---|
| Sponsored | 63 |
| Passed both chambers | 5 |
| Became law | 5 |
| Vetoed by the Governor | 0 |
Rank by bills passed: Rank 3 of 33 in the Senate (tied with 2 others) · 3 of 23 Republicans (tied with 2 others)
A bill's sponsor is the member who introduced it; co-sponsors aren't counted.
Bills that passed both chambers
| Bill | Result | Final action |
|---|---|---|
| SB 1572 (2026 Regular Session) Modifies provisions relating to public employee retirement systems |
Became law | May 15, 2026 |
| SB 1135 (2026 Regular Session) Creates "Bentley and Mason's Law" relating to child maintenance orders for certain persons convicted of the offense of driving while intoxicated |
Became law | May 15, 2026 |
| SB 1067 (2026 Regular Session) Establishes the Uniform Public Expression Protection Act, which provides procedures for dismissal of actions based on public expression |
Became law | May 15, 2026 |
| SB 903 (2026 Regular Session) Modifies and creates new provisions relating to telecommunications infrastructure |
Became law | May 11, 2026 |
| SB 68 (2025 Regular Session) Creates, repeals, and modifies provisions relating to elementary and secondary education |
Became law | May 13, 2025 |
Budget projects
Missouri's appropriation bills don't say which legislator asked for an item, so there's no budget figure for Missouri legislators.
Contested votes where they split
4 against the Senate President Pro Tem; 2 against most of their party.
| Date | Bill and motion | Their vote | Senate President Pro Tem | Most of their party |
|---|---|---|---|---|
| May 14, 2026 | HB 2097: Changes a pilot agricultural education program in elementary schools to a statewide program Third Reading and Final Passage |
Yea | Yea | Nay (split) |
| May 5, 2026 | HB 1644: Creates new provisions relating to joint employers Third Reading and Final Passage |
Yea | Nay (split) | Yea |
| April 21, 2026 | SB 1586: Modifies provisions relating to solid waste management Third Reading and Final Passage |
Yea | Nay (split) | Yea |
| March 25, 2026 | SB 945: Modifies provisions relating to court operations Third Reading and Final Passage |
Yea | Nay (split) | Yea |
| June 5, 2025 | SB 3: Modifies provisions relating to taxation Third Reading and Final Passage |
Nay | Yea (split) | Yea (split) |
Every roll call
How Mike Henderson voted on each of the 422 floor roll calls while in office, newest first.
| Date | Vote | Their vote | Most of their party | Senate President Pro Tem | Yeas–nays |
|---|---|---|---|---|---|
| Loading… | |||||
Contested and party-line votes link to their own pages; the rest link to the official record.
Contact, committees and caucuses
Contact
- Official page
- house.mo.gov
- mike.henderson@senate.mo.gov
- Capitol office
- Room 431, 201 W. Capitol Ave., Jefferson City, MO 65101
573-751-4008
Committees
- Local Government, Elections and Pensions Chair
- Commerce, Consumer Protection, Energy and the Environment Vice chair
- Appropriations
- Budget Conference
- Education
Contact details and committee assignments from Open States' data on the Missouri General Assembly, which it collects from the chambers' websites, as of Oct. 15, 2026.
Source: the Missouri House and Senate Journals, Jan. 8, 2025 to Sept. 16, 2026. How these numbers work · Corrections