President Donald Trump's administration on Thursday designated four European left-wing groups as terrorist organizations, following through on his vow to crack down on leftists after the assassination of conservative activist Charlie Kirk.

The networks targeted by Trump's Republican administration all appear to be based in Europe, with no operations in the United States. They are an Italian anarchist front that sent explosive packages to the then-president of the European Commission in 2003, two Greek networks believed to have planted bombs outside riot police and labor department buildings in Athens, and an anti-fascist group whose members were prosecuted by German authorities for a hammer attack against neo-Nazis in Dresden.

Europe has a long history of left-wing political violence, wh

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