US judge blocks deportation of Palestinian activist detained by ICE

"Tricia McLaughlin, said Khalil’s arrest was made to support Donald Trump’s presidential orders “prohibiting antisemitism”.

We all know this is a lie, since they do nothing about actual Nazis waving swastika flags.

I followed the original articles through https://www.theguardian.com/us-news/2025/mar/10/tunnel rush/palestinian--activist-columbia-arrest-ice , then, I'm curious - What legal basis does the Trump administration claim for Khalil's detention?