The Trump administration recently dispatched federal agents to the home of Mahmoud Khalil, arresting him not because he’s undocumented or has committed any crime but seemingly solely because he partook in pro-Palestinian protests.

Experts say there has to be a legal basis to revoke a person’s residency status, and removal needs to be ordered by an immigration judge.

Lawful permanent residents hold many of the same rights that US citizens have, but the government can deport them on certain, often vague, security grounds.