President Donald Trump said Wednesday night that he is designating antifa as a “major terrorist organization.”

“I am pleased to inform our many U.S.A. Patriots that I am designating ANTIFA, A SICK, DANGEROUS, RADICAL LEFT DISASTER, AS A MAJOR TERRORIST ORGANIZATION. I will also be strongly recommending that those funding ANTIFA be thoroughly investigated in accordance with the highest legal standards and practice,” Trump wrote on Truth Social.

Antifa is classified as a movement, not a specific group, so it’s unclear how Trump will carry out his order.