Note that the website here says the following on their own About page (https://prospect.org/about): "The American Prospect is devoted to promoting informed discussion on public policy from a progressive perspective."
I'm just some shit-talking forum schmoe, if you want to reach the admins just email hn@ycombinator.com.
Personally, and not related to your feature comment, I think this piece was correctly flagged and I flagged it myself. I'm a big fan of Perlstein's work but this piece is a fragment of some three part thing and in its current unfinished form is just the right combination of fluffy and spiky to produce mostly reflexive, grumpy comments - which you can see in thread.
And they are rated as "Strong Left category of bias and as Mixed Reliability/Opinion OR Other Issues in terms of reliability" (https://adfontesmedia.com/the-american-prospect-bias-and-rel...).
This explains the tone / bias throughout the article.