Yesterday's Inspector General report on the FBI's investigation of Hillary Clinton contained plenty of bombshells, including a promise by lead FBI investigator Peter Strzok that "We'll stop" Donald Trump from becoming president. The report reveals how unjustified secrecy and squirrelly decisions helped ravage the credibility of both Hillary Clinton's presidential campaign and the FBI. But few commentators are recognizing the vast peril to democracy posed by the sweeping prerogatives of federal agencies.

The FBI's investigation of Clinton was spurred by her decision to set up a private server to handle her email during her four years as secretary of state. The server in her Chappaqua, N.Y. mansion was insecure and exposed emails with classified information to detection by foreign sources and others.