I think this shows the Republicans are probably wasting their time if they plan on campaigning in Colorado during the next presidential election.
Okay, let's clear something up here. CO is not a blue state. Purple-blue like PA, perhaps, but not pure blue. If it was a blue state, Democrats would be able to win
without campaigning. We're nowhere near that point.
Also, the CO polls finally got something right! RCP had this at Gardner +2.5, just 0.4% off the actual margin. The Gubernatorial race featured the usual republican poll bias though.