Nor can I. I lived in Colorado for 5 years as a kid, (1955-60) and it was a very western sort of place. I had a blast doing stuff that is probably very illegal there now.
I get the impression it is the decay of Denver that is the root of it all. Read about the Amish mobs targeting people downtown, the illegals running amok, etc.
Other otherwise normal states like Oregon have similar issues where one large city dominates the political climate in spite of the nature of the people.
unfortunately I think it is not only the denver/boulder influence, but the influx of illegals. I hardly recognize the place sometimes. The southern burbs are still deep blue though. Sheriff Weaver of douglas county ( where I live) is one of the sheriffs pledging to fight illegal limitation of second amendment rights.