New congressional maps remain possible in at least three states – Wisconsin, Maryland, and New York – ahead of the 2028 elections, after the Colorado Supreme Court blocked a set of competing ballot measures that would have redrawn the state's map for that cycle.
On June 29, the Colorado Supreme Court ruled against five congressional redistricting ballot measures, finding that each violated the state constitution's single-subject requirement for citizen initiatives. The court concluded that the measures improperly combined a change to Colorado's redistricting process with the adoption of new district boundaries. Ballot measures filed by the group Coloradans for a Level Playing Field in February would have created a map likely to give Democrats up to 7-1 control of the state's eight congressional districts, currently split 4-4. Republican-aligned measures, filed by Advance Colorado and attorney Scott Gessler, would have adopted a map with a potential 5-3 Republican split. As a result of the ruling, however, none of the measures will appear on the November 2026 ballot.
Colorado's was one of several ongoing efforts to redraw congressional lines before the next scheduled redistricting following the 2030 census. Many of the remaining efforts are proceeding on longer timelines as a result of court schedules, constitutional amendment processes, or legislative calendars that could not be completed in time for this year's midterms.
