" ... the Boulder Democrat will advocate a vision for Colorado that tests how far to the left the state has shifted politically in the last decade."

Indeed.

It's going to be a close call in the primary.  I would prefer Polis going in, but Perlmutter would be a fine governor, too.

As we saw in the presidential election, "electability" can be deceiving.  Although Perlmutter seems more electable, Polis might be the man.