gentlemen, i am so happy to have you on this evening. michael, you wrote the book on trump. how much is michael cohen really know about president trump? >> well, to quote donald trump, he knows everything. that's what the president and businessman donald trump told me. bring your questions to michael cohen, he's got all the answers. this explains why the president will be staying up late to watch michael cohen's testimony and explains why this is really his worst nightmare to have a person who was present for ten years, inside every real estate deal or every endorsement arrangement or inside "the apprentice," he saw and heard just about everything so he'll have a lot to say. >> what about the president's children? how much does cohen know about them? >> he was as devoted to the children as he was the man he called mr. trump.