Columbia graduate student Mahmoud Khalil helped organize protests at the university against the Israel-Gaza war last spring. Khalil, who is a legal permanent resident of the United States, according to his lawyers, was detained over the weekend by immigration officers was detained by immigration officers and accused by the Trump administration of sympathizing with Hamas terrorists. So far no evidence of this has been reported.Immigration reporter Maria Sacchetti speaks with host Colby Itkowitz about Khalil’s arrest and what it could signal about how this administration will treat activists and immigrants. Today’s show was produced by Rennie Svirnovskiy, with help from Sabby Robinson. It was edited by Reena Flores and mixed by Sam Bair. Thanks also to Jenna Johnson.Subscribe to The Washington Post here.Where’s Martine?