The FBI’s branch and operations director couldn’t answer basic questions about the Trump administration’s designation of antifa as a terrorist organization at a congressional hearing Thursday.

Michael Glasheen was testifying before the House Committee on Homeland Security, and told Democratic Representative Bennie Thompson that after antifa, a political designation and movement that stands for “anti-fascism,” was designated by President Trump as a domestic terrorist organization, “that’s our primary concern right now.”

Antifa is “the most immediate violent threat we’re facing on the domestic side,” Glasheen said, prompting Thompson to ask, “So where is antifa headquartered?”

Glasheen was tripped up, and tried to say, “What we’re doing right now with the organization—” before Thompson cut him off and firmly asked, “Where in the United States does antifa exist, if it’s a terrorist organization and you’ve identified it as number one?”

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“Sir, you wouldn’t come to this committee and say something you can’t prove, I know. I know you wouldn’t do that. But you did,” Thompson concluded.

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