Then, on Sept. 22, Trump officially signed an executive order titled "Designating Antifa as a Domestic Terrorist Organization." For the Trump administration to call antifa an "organization" or "enterprise" in 2025 America, though, is a mischaracterization, according to experts. Why label antifa a terrorist organization? Once the group is officially designated as a terrorist organization, the federal government can freeze its assets and deny its members entry to the U.S. The easiest way would be for a successor or future president to revoke "Designating Antifa as a Domestic Terrorist Organization."