It's almost a year ago now, the Butler, Pennsylvania moment that changed history. You probably remember where you were when you heard the news—that then former president and candidate for president Donald Trump had been shot at a campaign rally. The nation had suffered trauma before; the killings of Abraham Lincoln and JFK wracked the country, and the near miss against Ronald Reagan reminded us of how tenuous our democracy can be. From that moment on, it seemed assured that he would become president again, and indeed he did. Now a new book is coming out detailing some of the...