The U.S. State Department has, for the first time in history, designated four extremely violent foreign Antifa groups as FTOs—Foreign Terrorist Organizations. This is a formal, legal designation that would criminalize membership or involvement. 

The Post Millennial
BREAKING: Trump admin designates foreign Antifa groups as terrorist orgs
The designation comes after Antifa-linked militants also targeted a Turning Point USA event taking place at UC Berkeley in California.