"After I finished reporting for this book on President Trump, I felt weariness. The country was in real turmoil. The virus was out of control. The economy was in crisis with more than 40 million out of work. A powerful reckoning on racism and inequality was upon us. There seemed to be no end in sight, and certainly no clear path to get there. I thought back to the conversation with Trump on February 7 when he mentioned the "dynamite behind every door," the unexpected explosion that could change everything. He was apparently thinking about some external event that would affect the Trump presidency. But now, I've come to the conclusion that the "dynamite behind the door" was in plain sight. It was Trump himself. The oversized personality. The failure to organize. The lack of discipline. The lack of trust in others he had picked, in experts. The undermining or the attempted undermining of so many American institutions. The failure to be a calming, healing voice. The unwillingness to acknowledge error. The failure to do his homework. To extend the olive branch. To listen carefully to others. To craft a plan. Mattis, Tillerson and Coats are all conservatives or apolitical people who wanted to help him and the country. Imperfect men who answered the call to public service. They were not the deep state. Yet each departed with cruel words from their leader. They concluded that Trump was an unstable threat to their country. Think about that for a moment: The top national security leaders thought the president of the United States was a danger to the country."