2025 to 2026 Legislature · State Assembly bill

AB 458

Relating to: admissibility of expert witness testimony.

In committee Last action March 23, 2026: Failed to pass pursuant to Senate Joint Resolution 1

Official bill page and text: docs.legis.wisconsin.gov

Sponsors 12

Prime sponsors

B. Jacobson, Duchow, Kreibich, Moses, Murphy, Mursau, O'Connor, Penterman, Piwowarczyk, Tittl, VanderMeer, Wittke

Status

In committee as of March 23, 2026. The 2025 to 2026 Legislature serves until the 2027 Legislature convenes on January 4, 2027.

Referred to: Assembly Judiciary, Assembly Rules (from the official referral record)

Roll-call votes 0

No roll-call votes recorded for this measure.

Timeline 9

Date	Chamber	Action
March 23, 2026	Assembly	Failed to pass pursuant to Senate Joint Resolution 1
January 22, 2026	Assembly	Laid on the table
January 20, 2026	Assembly	Placed on calendar 1-22-2026 by Committee on Rules
January 14, 2026	Assembly	Referred to committee on Rules
January 14, 2026	Assembly	Report passage recommended by Committee on Judiciary, Ayes 8, Noes 0
January 8, 2026	Assembly	Executive action taken
November 5, 2025	Assembly	Public hearing held
September 26, 2025	Assembly	Read first time and referred to Committee on Judiciary
September 26, 2025	Assembly	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

Data: Open States (bulk data, October 1, 2026 monthly extract, which has no roll-call tallies; public data, attribution appreciated). Official record: docs.legis.wisconsin.gov. Bill pages link to the official text, not copied.