Dartmouth College historian Mark Bray, author of Antifa: The Anti-Fascist Handbook, credits Anti-Racist Action (ARA) as the precursor of modern antifa groups in the United States. [11][12] The American antifa movement grew after Donald Trump was elected president of the United States in 2016. But it's not clear whether he can even do that because though Antifa — short for anti-fascist — is a movement that exists around the world, it is not a single group. Days after Charlie Kirk’s assassination, Donald Trump has designated Antifa, an extreme left-wing group, as a ‘major terrorist organisation’. The grouping, with its origins dating back to the 1920s-1930s, opposes racism, far-right ideologies, and what they define as fascism. While there’s no concrete evidence linking Tyler Robinson, the accused in Kirk’s killing, to the movement, he has exhibited signs of having leftist ideologies Antifa, short for anti-fascist, is a loose movement with roots in 20th-century Europe. In the US, it grew from anti-racist groups in the 1980s and 1990s.