In three separate unanimous opinions, the court ruled that each proposed measure violated Colorado’s constitutional “single subject” requirement, preventing them from advancing to the November ballot. A spokesperson for Coloradans for a Level Playing Field did not immediately comment on the rulings.
Two companion measures would have separately paused the commission and implemented new district boundaries. Had the initiatives qualified for the November ballot and been approved by voters, the revised congressional map would have taken effect for the 2028 elections.
“Changing the constitutionally mandated frequency of redistricting — however temporary the change — is not merely a mechanism to administer the new congressional district map,” Chief Justice Monica Marquez wrote in one unanimous decision. “Instead, it represents a seismic shift to Colorado’s longstanding redistricting process enshrined in the state constitution,” her opinion noted further.
In a second unanimous opinion, the Colorado Supreme Court concluded that dividing the original proposal into two separate ballot measures still failed to satisfy the state’s single-subject requirement.
The legal challenge comes amid a broader national debate over mid-decade congressional redistricting. Democrats have faced additional hurdles in pursuing similar efforts in states where independent redistricting commissions control the map-drawing process, including Colorado. Supporters of the Colorado measures argued the changes were necessary to redraw district lines, while opponents contended they would have significantly altered the state’s current redistricting process.
The issue gained momentum last year after President Donald Trump encouraged Republican-led states to consider redrawing congressional maps in an effort to strengthen the GOP’s narrow majority in the U.S. House of Representatives.
Virginia Democrats advanced a comparable ballot measure this year that sought to bypass the state’s independent redistricting commission and adopt a new congressional map. Although voters narrowly approved the proposal, the Virginia Supreme Court later blocked it from taking effect.
In its May 4-3 ruling, the Virginia Supreme Court invalidated the voter-approved congressional map, finding that Democratic lawmakers violated procedural requirements under the state constitution when placing the referendum on the ballot. The ruling forced Virginia to redraw its congressional districts ahead of the 2026 midterm elections and erased what Democrats hoped would become a 10-1 advantage in the state’s congressional delegation.
House Democratic Leader Hakeem Jeffries faced mounting criticism following the Virginia high court’s decision, as Republicans accused Democrats of overreaching in a high-stakes redistricting battle that ultimately collapsed in court. Before the ruling, Jeffries had strongly defended the effort and argued that Democrats had a strong legal basis. “The law is with us in Virginia,” Jeffries previously said while promoting the redistricting plan. That statement quickly came back to haunt Democrats after the state’s highest court sided with Republican challengers and blocked the maps from taking effect.
The decision marked a major setback in the broader national redistricting war unfolding between Republican- and Democratic-controlled states ahead of the midterms. Republicans appear poised to enter the 2026 elections with a significant advantage created by redistricting efforts across the country, as a coast-to-coast battle over congressional maps nears its conclusion.
The fight began last year when Texas Republicans, encouraged by President Trump, moved to redraw congressional districts in an effort to strengthen the GOP’s position in the U.S. House of Representatives. Since then, both parties have engaged in an increasingly aggressive struggle over congressional boundaries, but Republicans currently hold the upper hand as the legal and political battles continue to unfold across state courts nationwide.
