In one noteworthy exchange with "Today" show host Savannah Guthrie, Wolff claimed that every single person around the president, including senior advisers and family members, questions President Donald Trump's intelligence and fitness for office. When asked what else people around the president say about him, Wolff described the one thing that everyone allegedly has in common. "They all say he is like a child," Wolff said. "And what they mean by that is he has a need for immediate gratification. It's all about him." Wolff says his book draws on months of research and over 200 interviews, many of which were taped, though most of the sources remain anonymous.