Palestinian activist Mahmoud Khalil by Immigrations and Custom Enforcement agents. The video was taken by his wife Noor Abdalla, who is eight months pregnant, the ACLU said. The arrest happened Saturday night at their home in Columbia University campus housing.

The Trump administration’s detention of a green-card holder who was a leader in the Columbia University protests against Israel has put a face on the debate over immigration and the limits of free speech, with a sympathetic twist: The man, Mahmoud Khalil, is married to an American, and they are expecting their first child next month.

If the Trump Administration comes out on the wrong side of this fight, it will be because defending free speech remains a politically lucid and powerful principle.

After Mahmoud Khalil, Trump will be “coming after others” Iman Abid, Director of Advocacy at US Campaign for Palestinian Rights talks about President Trump’s policies towards social justice movements and the arrest of Mahmoud Khalil.