Book excerpt: "This is a book about ending presidencies through the power of impeachment. It's also a book about fighting for the US Constitution and the democracy it protects. As such, this book is a general exploration of law, history, and politics bearing on the exercise of the impeachment power in the US Constitution. Our goal is to identify general principles and frameworks that should govern any impeachment analysis, in each chapter identifying important recurring questions and proposing a framework for how to think about them"--