I don’t think he knows who the chant is about.
LOL
From what I heard, Sessions repeated the chant while saying that he had heard it some time ago.
He did not join in the chanting which is what CNN tries to make it seem like.
The day CNN hires a competent, honest reporter is the day it will go bankrupt
Right now it is the home of the “History-Knowledge Deprived”, the “Insanity is Normal” bunch, and the “Hate anything and anyone who is for protecting America”.
That is why it is called the “Crazy Newsnuts Network”.