Mahmoud Khalil, a recent Columbia graduate who is Palestinian, was detained by the Department of Homeland Security almost one week ago. Since then, Khalil, who is in the United States on a green card,

I was a student at Columbia University, where I covered tense campus protests over the Israel-Hamas war for the college newspaper and for POLITICO. So I’m familiar with Mahmoud Khalil, a former Columbia student who I’ve chatted with in the past and appears to be the first target of the Trump administration’s effort to crack down on student protesters.