The 2025 Senate Resolution 1, introduced on January 6, 2025, by Senators LeMahieu, Feyen, and Felzkowski, officially organizes the 2025-2026 Wisconsin Senate. The resolution outlines the election of presiding officers, legislative officers, and political party officers as per the Wisconsin Constitution. Senator Mary J. Felzkowski is designated as the President, with Senator Patrick Testin serving as President pro tempore. The legislative officer appointed is Honorable Tom Engels as Sergeant at Arms.

Additionally, the resolution lists the leadership for both the majority and minority parties within the Senate. Senator Devin LeMahieu is named as the Majority Leader, with Senators Dan Feyen, Van Wanggaard, and Rachael Cabral-Guevara holding other key positions. For the minority party, Senator Dianne Hesselbein serves as the Minority Leader, supported by Senators Jeff Smith, Mark Spreitzer, and Dora Drake in various roles. Following the adoption of this resolution, the chief clerk is tasked with notifying the assembly and the governor that the Senate is organized and ready to conduct its business.