arma virumque cano (et alia)
Leftists who have no argument always default to talking about diversity, as if that answers the points being made.
I know nothing about Jim Porter. I do, however, have a general observation regarding Chicago politicians. It's based upon what I observed while living in the Chicago metro area and seems to be independent of any demographic factors. Revenge is a pretty typical among Chicago politicians who are in a position to exact it. Given the city's political history an attempt at political revenge would be far less of a surprise than a refusal to seek it.