There is a clear contradiction in being in communion with an heretic, even the Pope. Some try to save the position by saying Jesus deposes the Pope. Here's why that only creates more contradictions.
Papal Supremacy Series: The Church as Sacrament
Tag: Pope John Paul II
Papal Supremacy Series: The Pope as Head and Member
Seeing the main contradiction of papal supremacy, we see the further implications of embracing this contradiction: the Church is no longer a perfect society.
Apologia Anglicana 