He has a point about the leftist trend to label rather than engage. I mean, the left is fairly preoccupied with its own taxonomy. I am not sure how much that played into Hillary's loss though. Mostly she just didn't represent change when people were craving it.
I guess his point is that is how Hillary got the nomination, her label as a liberal was good enough.
Bernie beat Hillary here in the Michigan primary, and then Trump beat Hillary. In both cases, the polls were totally off. It would be a mistake to think that is because Michigan is full of rednecks.