President Donald Trump has officially designated Antifa as a domestic terrorist organization, a decision he defended as long overdue due to the group's "horrible" incitement and actions. The declaration follows the assassination of conservative commentator Charlie Kirk in Utah, as the alleged shooter's anti-fascist slogans and leftist ideology have prompted scrutiny of broader extremist networks. The administration, with support from officials like Stephen Miller and J.D. Vance, is pursuing a strategy that includes potential RICO prosecutions to target the financiers and organizers of civil unrest. A significant challenge to this designation is Antifa's decentralized, leaderless structure, which legal experts note would require proving coordination as a formal entity for a terror label.