Redistricting in Colorado
The following timeline is a high-level overview outlining major redistricting events and activity in the state of Colorado over the last 10 years.
Census data delivered to Colorado.
A divided legislature failed to send a congressional map to Democratic Governor John Hickenlooper.
The legislature’s failure to draw a new congressional map spurred a flurry of litigation in Colorado state court. The district court adopted a new map proposed by one of the plaintiff groups during the litigation, and the Colorado Supreme Court affirmed that decision.
The map initially submitted by the Colorado Reapportionment Commission was rejected by the Colorado Supreme Court and returned for re-drafting. The Commission submitted revised plans, which were approved by the state Supreme Court.
President Barack Obama won the state with 51% of the vote and the congressional delegation was almost evenly split between Democrats and Republicans.
With the support of the NDRC, Democrat Jared Polis won the 2018 governor’s race by a 6-point margin with 51% of the vote.
On Election Day, Colorado voters passed Amendments Y & Z, a redistricting reform measure that will bring fair state legislative and congressional districts to the state, with a huge margin (70%). With the support of NDRC, Colorado Democrats also flipped the Colorado Senate and gained 5 seats in the Colorado House.