“Democracy,” wrote H.L. Mencken, “is the theory that the common people know what they want and deserve to get it good and hard.” A majority of Colorado voters have made it clear that they want to be governed by Democrats.

With Democrats presiding over a struggling economy, widespread crime and social disorder, this result is dumbfounding. Surely, Coloradans were ready to restore some measure of political balance?

Instead, voters soundly rejected Republican candidates across the board. Democrats won every race in which both parties devoted resources. They even won some seats they expected to lo...