We’ve been here before. As I and my colleague Fritz Schwarz detail in our new book, the Senate established the Church Committee because of a rising tide of evidence that the FBI, the CIA and other intelligence agencies had been engaged in the serial, and seriously partisan, abuse of intelligence powers. This history, which Fritz and I will be discussing in a series of presentations in New York, Chicago and Washington from Tuesday onward ought to be required reading for a Congress that seems to have lost its way in a thicket of executive branch claims about what must be done and what we cannot do without.