Yes, Cushing was one those that Pope St. Pius X described when he said:
"For as We have said, they put their designs for her ruin into operation not from without but from within; hence, the danger is present almost in the very veins and heart of the Church, whose injury is the more certain, the more intimate is their knowledge of her. Moreover they lay the axe not to the branches and shoots, but to the very root, that is, to the faith and its deepest fires.
Cushing's partner was the Holy Office's F. Cardinal Marchetti-Selvaggiani, yet the Cushingites will never see this because they believe the enemies popped into existence in 1962 or so. They believe the slander of the enemy and they still promote the obvious lies as they reject the truth of the only way to salvation.
Yet reading Pope St. Pis X's Pacsendi, we read that the pope knew perfectly well and perfectly described Cushing right down to the laying of the ax to the very root.
The Cushingites are so ignorant that they do not even know that the "very root" is the dogma EENS, nor will they ever accept it - that is a testament to Cushing's biggest accomplishment, convincing otherwise pious Catholics to promote his heresy that there is salvation outside the Church while continuing his legacy of slandering one who defended that dogma.
As I said, they are in league with Cushing, as such, they should expect to meet up with him in eternity when their turn comes.