After the 2020 census, New Mexico’s congressional map was drawn by the Legislature during the 2021 second special session, with lawmakers relying in part on concepts developed by the state’s advisory Citizen Redistricting Committee (“People’s Map” concepts). The Legislature enacted the congressional plan as Senate Bill 1, which Gov. Michelle Lujan Grisham signed on Dec. 17, 2021. The map quickly drew litigation: the Republican Party of New Mexico filed Republican Party of N.M. v. Toulouse Oliver in state district court on Jan. 21, 2022, challenging the plan as an unconstitutional partisan gerrymander under the state constitution. After interim rulings (including denial of a preliminary injunction in 2022), the New Mexico Supreme Court held in July 2023 that partisan-gerrymandering claims can be heard under the state constitution and directed the trial court to resolve the case on an expedited schedule. The trial court upheld the map in October 2023, and the New Mexico Supreme Court affirmed and dismissed the remaining challenge on Nov. 27, 2023, leaving SB 1 in place.

New Mexico’s state legislative redistricting followed a separate but parallel legislative track. The Legislature enacted new state House and state Senate district plans in late 2021 and early 2022. House Bill 8 for the House map was signed by the governor on Dec. 29, 2021, and Senate Bill 2 for the Senate map was signed on Jan. 6, 2022.

last updated: Jan 2026