President Trump's firing of FBI chief James Comey on May 9 spurred much of the media and many Democrats to rally around America's most powerful domestic federal agency. But the FBI has a long record of both deceit and incompetence. Five years ago, Americans learned that the FBI was teaching its agents that "the FBI has the ability to bend or suspend the law to impinge on the freedom of others." This has practically been the Bureau's motif since its creation in 1908.

The bureau was small potatoes until Woodrow Wilson dragged the United States into World War I. In one fell swoop, the number of dangerous Americans increased by perhaps twentyfold. The Espionage Act of 1917 made it easy to jail anyone who criticized the war or the government. In September 1918, the bureau, working with local police and private vigilantes, seized more than 50,000 suspected draft dodgers off the streets and out of the restaurants of New York, Newark, and Jersey City. The Justice Department was disgraced when the vast majority of young men who had been arrested turned out to be innocent.

In January 1920, J. Edgar Hoover — the 25-year-old chief of the bureau's Radical Division — was the point man for the "Palmer Raids." Nearly 10,000 suspected Reds and radicals were seized. The bureau carefully avoided keeping an accurate count of detainees (a similar pattern of negligence occurred with the roundups after the 9/11 attacks). Attorney General Mitchell Palmer sought to use the massive roundups to propel his presidential candidacy. The operation took a drubbing, however, after an insolent judge demanded that the Justice Department provide evidence for why people had been arrested. Federal judge George Anderson complained that the government had created a "spy system" that "destroys trust and confidence and propagates hate. A mob is a mob whether made up of government officials acting under instructions from the Department of Justice, or of criminals, loafers, and the vicious classes."

After the debacle of the Palmer raids, the bureau devoted its attention to the nation's real enemies: the U.S. Congress. The bureau targeted "senators whom the Attorney General saw as threats to America. The Bureau was breaking into their offices and homes, intercepting their mail, and tapping their telephones," as Tim Weiner recounted in his 2012 book Enemies: The History of the FBI. The chairman of the Senate Foreign Relations Committee was illegally targeted because the bureau feared he might support diplomatic recognition of Soviet Russia.

Hoover, who ran the FBI from 1924 until his death in 1972, built a revered agency that utterly intimidated official Washington. The FBI tapped the home telephone of a Supreme Court clerk, and at least one Supreme Court Justice feared the FBI had bugged the conference room where justices privately discussed cases. In 1945, President Harry Truman wrote in his diary, "We want no Gestapo or Secret Police. FBI is tending in that direction…. This must stop." But Truman did not have the gumption to pull in the reins.