The secretary of state said he was trying to expel “lunatics” who had taken part in campus movements, as well as criminals. Some are permanent U.S. residents.

The government has arrested international students who participated in pro-Palestinian protests on campuses.

Over the past several weeks, a handful of student visa holders and other legal residents have faced deportation for nebulous allegations that they supported terrorism—often being detained and taken away by immigration officials with seemingly no due process,