Traditionalist Catholics other than sedevacantists recognize as legitimate the line of Popes leading to and including Pope Francis. Some of them hold that one or more of the most recent popes have held and taught unorthodox beliefs, but do not go so far as to say that they have been formal heretics though as of 2018 there are some who are considering Pope Francis a heretic because of the encyclical "Amoris Laetitia". Sedevacantists, however, claim that the infallible Magisterium of the Catholic Church could not have decreed the changes made in the name of the Second Vatican Council, and conclude that those who issued these changes could not have been acting with the authority of the Catholic Church. Accordingly, they hold that Pope John XXIII and his successors left the true Catholic Church and thus lost legitimate authority in the Church. A formal heretic, they say, cannot be the Catholic pope.