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.

In Wisconsin, a state lawsuit alleges that the state’s congressional map constitutes an unconstitutional partisan gerrymander. While the state supreme court previously dismissed two challenges against the map in March 2024 and June 2025, in November 2025, the court ordered a pair of three-judge panels to hear two lawsuits against the map. After the panels dismissed the suits citing state supreme court precedent that partisan gerrymandering claims are not justiciable, plaintiffs appealed to the state supreme court, which agreed in May and June 2026 to take up the cases.

In Maryland, Senate President Bill Ferguson (D) and House Speaker Joseline Peña-Melnyk (D) announced an August 2026 special session for congressional redistricting. Attempts to take up redistricting ahead of the 2026 elections did not pick up traction – Ferguson opposed Gov. Wes Moore’s (D) advisory commission’s proposal of an all-Democratic map.

In New York, the Legislature approved a proposed constitutional amendment that would repeal the state's prohibition on partisan gerrymandering and allow the Legislature to redistrict mid-decade, a process that is otherwise the responsibility of the state’s redistricting commission. Under New York's constitutional amendment process, the Legislature must pass the measure again in a subsequent session before it can go before voters in a statewide vote, which is expected in 2027. If approved, any resulting map would take effect for the 2028 elections.

Georgia also considered mid-decade redistricting after Gov. Brian Kemp (R) called a special legislative session in June 2026, but Republican legislative leaders announced on the session's first day that they would not redraw the state's congressional map, and no new map was considered.