Consider me one of those followers. That is, till about two months ago when he went all in for Rubio first and then went full bore for Cruz when Rubio dropped out. Cancelled my 24/7 and now listen to him until he pisses me off. Usually within 10 or 15 minutes. Today, it took 3 minutes!
Plus, his snarky, condescending, hateful remarks about Trump and his supporters (Trumpists as he calls us) really sent me away.
Rush's confidence in the superiority of his intellect served him well till now. His failure to grasp the biggest sea change since Reagan just sunk his battleship. But he had a long run and made a lot of money. I am sure he will continue to have some sort of following. Personally I have difficulty listening to him.