Wisconsin · 2025-2026 Regular Session · Bill
AB 458: Relating to: admissibility of expert witness testimony.
Did not advance Official data
- Introduced
- In committee
- Passed one chamber
- Passed both chambers
- Enacted
- Did not advance
Last official action: ·Record last updated:
Plain-language summary
AB 458 is a bill introduced in the Wisconsin House on September 26, 2025. According to its official title, it concerns: Relating to: admissibility of expert witness testimony. Primary sponsor: Brent Jacobson (Republican), Rob Kreibich (Republican), Clint Moses (Republican), Dave Murphy (Republican), Jeff Mursau (Republican), Jerry O'Connor (Republican), Will Penterman (Republican), Jim Piwowarczyk (Republican), Paul Tittl (Republican), Nancy VanderMeer (Republican), Bob Wittke (Republican), Cindi Duchow (Republican). It lists 4 additional sponsors. Most recent recorded action (March 23, 2026): Failed to pass pursuant to Senate Joint Resolution 1.
Generated automatically from the official title, sponsor list, and status record only. It does not characterize the bill’s purpose or effects. How summaries are written
Sponsors
Sponsors by party (alphabetical): Republican 16
| Name | Role | Party | Chamber | District |
|---|---|---|---|---|
| Brent Jacobson | Primary sponsor | Republican | House | 87 |
| Rob Kreibich | Primary sponsor | Republican | House | 28 |
| Clint Moses | Primary sponsor | Republican | House | 92 |
| Dave Murphy | Primary sponsor | Republican | House | 56 |
| Jeff Mursau | Primary sponsor | Republican | House | 36 |
| Jerry O'Connor | Primary sponsor | Republican | House | 60 |
| Will Penterman | Primary sponsor | Republican | House | 38 |
| Jim Piwowarczyk | Primary sponsor | Republican | House | 98 |
| Paul Tittl | Primary sponsor | Republican | House | 25 |
| Nancy VanderMeer | Primary sponsor | Republican | House | 70 |
| Bob Wittke | Primary sponsor | Republican | House | 63 |
| Cindi Duchow | Primary sponsor | Republican | House | 97 |
| Dan Feyen | Co-sponsor | Republican | Senate | 20 |
| Howard Marklein | Co-sponsor | Republican | Senate | 17 |
| Van Wanggaard | Co-sponsor | Republican | Senate | 21 |
| Eric Wimberger | Co-sponsor | Republican | Senate | 2 |
“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.
Recent official actions
- Failed to pass pursuant to Senate Joint Resolution 1
- Laid on the table
- Placed on calendar 1-22-2026 by Committee on Rules
- Referred to committee on Rules
- Report passage recommended by Committee on Judiciary, Ayes 8, Noes 0
- Executive action taken
- Public hearing held
- Read first time and referred to Committee on Judiciary
- Introduced by Representatives B. Jacobson, Kreibich, Moses, Murphy, Mursau, O'Connor, Penterman, Piwowarczyk, Tittl, VanderMeer, Wittke and Duchow; cosponsored by Senators Wanggaard, Feyen, Marklein and Wimberger