Maddow: Donald Trump Is ‘Gaffe-Proof,’ Nothing He Says Matters
http://www.mediaite.com/tv/maddow-donald-trump-is-gaffe-proof-nothing-he-says-matters/
This is because he attacks back, and doesn't take any prisoners from the media. The media have been a big determinant of who is and who isn't Teflon. Trump doesn't let them shape the narrative, and actually takes it to them. He hits back. They don't like that, and don't have an answer for it. Now they know how it feels to have someone else control the narrative.