The Trump administration detained a pro-Palestine activist Saturday night in a chilling assault on free speech. Immigration and Customs Enforcement arrested Mahmoud Khalil, a leader in the Columbia University protest movement, despite his being a green card holder. Initially, they told his lawyer, Amy Greer, that his student visa was being revoked, even though he didn’t have one. When ICE agents were informed over the phone by Greer that Khalil has a green card, they reportedly hung up the