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Wisconsin · 2025-2026 Regular Session · Bill

SB 459: Relating to: admissibility of expert witness testimony.

Enacted Official data

  1. Introduced
  2. In committee
  3. Passed one chamber
  4. Passed both chambers
  5. Enacted

Last official action: ·Record last updated:

Plain-language summary

SB 459 is a bill introduced in the Wisconsin Senate on October 2, 2025. According to its official title, it concerns: Relating to: admissibility of expert witness testimony. Primary sponsor: Van Wanggaard (Republican), Dan Feyen (Republican), Howard Marklein (Republican), Eric Wimberger (Republican). It lists 12 additional sponsors. Most recent recorded action (March 9, 2026): Published 3-7-2026.

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

NameRolePartyChamberDistrict
Van WanggaardPrimary sponsorRepublicanSenate21
Dan FeyenPrimary sponsorRepublicanSenate20
Howard MarkleinPrimary sponsorRepublicanSenate17
Eric WimbergerPrimary sponsorRepublicanSenate2
Cindi DuchowCo-sponsorRepublicanHouse97
Brent JacobsonCo-sponsorRepublicanHouse87
Rob KreibichCo-sponsorRepublicanHouse28
Clint MosesCo-sponsorRepublicanHouse92
Dave MurphyCo-sponsorRepublicanHouse56
Jeff MursauCo-sponsorRepublicanHouse36
Jerry O'ConnorCo-sponsorRepublicanHouse60
Will PentermanCo-sponsorRepublicanHouse38
Jim PiwowarczykCo-sponsorRepublicanHouse98
Paul TittlCo-sponsorRepublicanHouse25
Nancy VanderMeerCo-sponsorRepublicanHouse70
Bob WittkeCo-sponsorRepublicanHouse63

“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.

Recent official actions

  1. Published 3-7-2026
  2. Report approved by the Governor on 3-6-2026. 2025 Wisconsin Act 92
  3. Presented to the Governor on 3-5-2026
  4. Report correctly enrolled
  5. Received from Assembly concurred in
  6. Ordered immediately messaged
  7. Read a third time and concurred in
  8. Rules suspended
  9. Ordered to a third reading
  10. Read a second time
  11. Rules suspended to withdraw from calendar and take up
  12. Placed on calendar 1-22-2026 by Committee on Rules

Showing 12 most recent of 26 actions. Full history

Sources

  1. Open States / Plural (data from the official legislature website)
  2. Official legislature source