Is Francis a Heretic? Pope?

Cardinal Gerhard Müller has said that while Pope Francis “has already uttered plenty of material heresies” he magically is still Pope. He says the same about the possibly doubtful election of Francis at the conclave. The accelerating novelties - 'heresy of practice' [Card. Muller] - being introduced by Jorge Bergoglio is dizzying. Is it time to say to Francis 'Go behind me, Satan, thou art a scandal unto me: because thou savourest not the things that are of God, but the things that are of men.' [Matthew 16:23] and 'We ought to obey God, rather than men' [Acts Of Apostles 5:29]?