President Trump says the arrest of Mahmoud Khalil is the first of many in the administration’s campaign to dismantle what it calls extreme leftist ideology on U.S. campuses.

The arrest of a Palestinian graduate student who represented anti-Israel protests at Columbia University marks a significant shift for the U.S. government, even from an administration that has prioritized cracking down on both immigration and campus anti-war protests.

Prominent New York City immigration activist Ravi Ragbir felt a sense of deja vu after learning of the detention on Saturday of a Palestinian student activist at Columbia University. Ragbir was taken into custody for deportation in 2018,