Roughly seventy years ago, FBI Director J. Edgar Hoover famously declared, "There is no organized crime in America." Hoover's stubborn denial of the existence of the mafia continued despite ample evidence to the contrary, from arrests to congressional testimony.

Many have speculated on why Hoover maintained his stubborn denial. Perhaps, they say, he was trying to avoid the political embarrassment of long ignoring the single largest criminal network in the country.

Many today seem to be adopting a Hoover-esque wilful blindness about another violent group: Antifa.

Politicians and pundits are denying that the left-wing anarchist group exists, mocking President Trump's designation of Antifa as a terrorist organization.

Rep. Dan Goldman (D-N.Y.) seemed to morph into Hoover before our very eyes, including a posting in which he challenged anyone to "name one member of 'Antifa.'"

Former House Judiciary Chair Jerrold Nadler (D-N.Y.) was widely ridiculed for denying the existence of Antifa.

Others on the left have joined Goldman in this absurd claim. Late-night host Jimmy Kimmel committed part of his monologue to assure viewers that Antifa is no more than a mythical "chupacabra." "You understand there is no Antifa," he said. "This is an entirely made-up organization."

I have testified about Antifa before Congress, run columns on the organization for over a decade, and wrote a book discussing Antifa. I

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