The nature of progressive power in 2021 is odd and interesting. 1. They exercise a veto over moderate legislation 2. They can defeat moderates in safe Democratic districts 3. They dominate NGO world, political organizing, and large news organizationshttps://www.washingtonpost.com/opinions/2021/10/03/progressives-finally-have-power-washington/ …
That's a definition that begs the question of polarization. In earlier eras, "moderate" was defined against the electorate as a whole, but now there are two disjoint electorates inhabiting their own worlds.