Protected speech.

The Trump administration came into office claiming to stand for free speech. Yet the arrest and detention of Mahmoud Khalil, a lawful permanent resident who led pro-Palestinian student protests at Columbia University, has dealt a serious blow to the First Amendment.

Going back to 1941, the Supreme Court has held that resident noncitizens have free-speech rights. Deporting Khalil for his political speech would violate this basic freedom — and set back First Amendment rights for all Americans.