The Colorado Supreme Court has halted a series of ballot initiatives that sought to redraw the state’s congressional districts before the next census, ruling that the proposals violated the state constitution by combining multiple issues into single measures.
Colorado Supreme Court Rejects Redistricting Initiatives
In two unanimous decisions issued on June 29, the court reviewed five ballot proposals designed to reshape Colorado’s U.S. House districts beginning with the 2028 elections.
The measures included plans backed by both Democrats and Republicans, each seeking to alter the state’s current congressional map while changing the process used to draw district boundaries.
The justices concluded that the initiatives improperly attempted to combine constitutional changes to Colorado’s redistricting system with the approval of new congressional maps, violating the state’s single-subject requirement for ballot measures.
Court Says Constitutional Rules Cannot Be Circumvented
Justice Richard L. Gabriel, writing for the court in one of the rulings, said supporters of the proposals could not avoid constitutional restrictions by splitting their plans into multiple interconnected initiatives.
According to Gabriel, allowing linked ballot measures that depend on one another would effectively permit proponents to achieve indirectly what the constitution prohibits directly.
The court ruled that making one proposal contingent upon another does not eliminate the requirement that each initiative address only a single subject.
Competing Political Maps Were at the Center of the Dispute
The five proposals offered dramatically different visions for Colorado’s congressional representation.
Three initiatives would have produced maps heavily favoring Democrats, including one that could have created a 7-1 Democratic advantage in the state’s U.S. House delegation.
Two Republican-supported proposals would have generated maps more favorable to the GOP, including one that projected a 5-3 Republican advantage.
Beyond redrawing district lines, the measures also sought to bypass Colorado’s independent redistricting commission by allowing lawmakers or voters to adopt new maps during the middle of the decade rather than waiting for the next census.
Chief Justice Calls Mid-Decade Redistricting a Major Policy Shift
Chief Justice Monica M. Márquez, authoring the opinion on two of the ballot measures, emphasized that authorizing mid-decade redistricting is a separate constitutional question from approving a specific congressional map.
She described altering the state’s once-per-decade redistricting schedule as a “seismic shift,” arguing that voters could reasonably support one proposal while opposing the other.
Because the initiatives bundled those distinct questions together, they failed to satisfy Colorado’s constitutional requirements.
Márquez added that some voters might favor maintaining an independent redistricting process even if they preferred a different congressional map, while others could support procedural changes without endorsing a partisan redraw.
Decision Preserves Colorado’s Current Congressional Map
The rulings leave Colorado’s existing congressional districts and independent redistricting commission unchanged for now.
The court’s decisions also block efforts to place the proposed constitutional amendments and new maps before voters in the 2026 general election, preventing either party from gaining an early advantage through mid-decade redistricting.
Colorado Joins National Debate Over Congressional Maps
The legal battle unfolds amid an increasingly aggressive national fight over congressional boundaries as both major political parties pursue favorable maps ahead of future elections.
Several states have already undertaken mid-decade redistricting efforts.
Texas redrew congressional districts after lawmakers sought to strengthen Republican prospects, while California voters approved changes expected to benefit Democratic candidates.
According to the National Conference of State Legislatures, 10 states have completed mid-decade redistricting, with additional efforts underway across the country.
Courts have also played a decisive role elsewhere.
State supreme courts in Virginia and Utah have recently weighed in on competing redistricting disputes, while the U.S. Supreme Court’s decision in Louisiana v. Callais prompted multiple Southern states to revise congressional maps.
Ruling Sends Message to Future Redistricting Campaigns
By striking down all five initiatives, the Colorado Supreme Court reinforced the state’s constitutional protections governing ballot measures and redistricting.
The decisions make clear that future attempts to change Colorado’s redistricting process must stand on their own and cannot be packaged together with proposals adopting specific congressional maps.
For now, the state’s independent commission will remain responsible for drawing congressional districts following the traditional once-a-decade census cycle.
