"Donald Trump is the kind of guy that wants you to like him. He wants to be the centre of attention. A TV reporter is somebody who gives him a very grand stage, and I was the first national television correspondent following his campaign. So he wanted to charm me - and when he couldn't do that, he attacked. And it's the same thing he does every day with senators; he'll be charming with them and the next day he will go out and attack them on Twitter and if they don't fall in line. He toggles back and forth between these two aspects of his personality."