From St Robert Bellarmine, De Romano Pontifice, lib. II, cap. 30.
“There is no basis for that which some respond to this: that these Fathers based themselves on ancient law, while nowadays, by decree of the Council of Constance, they alone lose their jurisdiction who are excommunicated by name or who assault clerics. This argument, I say, has no value at all, for those Fathers, in affirming that heretics lose jurisdiction, did not cite any human law, which furthermore perhaps did not exist in relation to the matter, but argued on the basis of the very nature of heresy. The Council of Constance only deals with the excommunicated, that is, those who have lost jurisdiction by sentence of the Church, while heretics already before being excommunicated are outside the Church and deprived of all jurisdiction. For they have already been condemned by their own sentence, as the Apostle teaches (Tit. 3:10-11), that is, they have been cut off from the body of the Church without excommunication, as St. Jerome affirms.”