Antifa-aligned activists have frequently clashed with far-right protesters and police

Antifa-aligned activists have frequently clashed with far-right protesters and police

Antifa, designated a "domestic terrorist organization" by US President Donald Trump on Monday, is a nebulous movement of left-wing "anti-fascist" activists that experts say is more a political ideology than an organized group.

Trump's move follows the September 10 assassination of conservative influencer Charlie Kirk and is one of several actions the Republican president has threatened to take against opponents he accuses of fomenting violence.

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