Trump has vowed to take action against left-wing groups he accuses of encouraging violence following Charlie Kirk's death. TRUMP STRIKES Trump designates Antifa a terror group just a day after Charlie Kirk memorial as Pres slams ‘sick & dangerous’ movementDONALD Trump has declared Antifa as a terror organisation just a day after Charlie Kirk's memorial, with the president vowing to crack down on the "sick" movement. Trump signed an executive order on Monday that designated Antifa as a "domestic terrorist organisation" after he vowed to do so last week. This is not Trump's first attempt at designating the movement as a domestic terrorist organisation. "There is no domestic terrorist organisation list in the US," she said.