Mr Khalil said his story is a warning to others in the US, saying it is part of a broader strategy by the Trump administration to "suppress dissent."
"Visa-holders, green-card carriers, and citizens alike will all be targeted for their political beliefs," he warned.
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"Visa-holders, green-card carriers, and citizens alike will all be targeted for their political beliefs," he warned.
Mahmoud Khalil: Palestinian Columbia student activist writes about arrest
Mr Khalil warns that his arrest is part of a broader effort by the Trump administration to "suppress dissent".
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