in support of the proposition that St Peter is still THE Pope, I quote one of hissuccessors, undoubtedly legitimate:
"22. But if one wishes to search out the true source of all the evils which We have already lamented, as well as those which We pass over for the sake of brevity, he will surely find that from the start it has ever been a dogged contempt for the Church's authority. The Church, as St. Leo the Great teaches,[19] in well-ordered love accepts Peter in the See of Peter, and sees and honors Peter in the person of his successor the Roman pontiff. Peter still maintains the concern of all pastors in guarding their flocks, and his high rank does not fail even in an unworthy heir.[20] In Peter then, as is aptly remarked by the same holy Doctor, the courage of all is strengthened and the help of divine grace is so ordered that the constancy conferred on Peter through Christ is conferred on the apostles through Peter. It is clear that contempt of the Church's authority is opposed to the command of Christ and consequently opposes the apostles and their successors, the Church's ministers who speak as their representatives.[21] He who hears you, hears me; and he who despises you, despises me; and the Church is the pillar and firmament of truth, as the apostle Paul teaches.[22] In reference to these words St. Augustine says: "Whoever is without the Church will not be reckoned among the sons, and whoever does not want to have the Church as mother will not have God as father."[23]"
From Ubi Primum
"The Church, as St. Leo the Great teaches,[19] in well-ordered love accepts Peter in the See of Peter, and sees and honors Peter in the person of his successor the Roman pontiff. Peter still maintains the concern of all pastors in guarding their flocks, and his high rank does not fail even in an unworthy heir."..."It is clear that contempt of the Church's authority is opposed to the command of Christ and consequently opposes the apostles and their successors, the Church's ministers who speak as their representatives."