Appeals to Khalil’s free speech rights are meritless. A green card is not synonymous with citizenship, though many seem to believe otherwise. Indeed, the federal government has the power to revoke a green card at any time, consistent with its statutory authority and assuming due process.

One hopes he will be free to express his opinions unfettered in his homeland of Syria or Algeria, where he is a citizen.

The White House says the secretary of state can revoke the visa of Palestinian activist Mahmoud Khalil -- but experts tell ABC News it can't happen without due process.

White House Press Secretary Karoline Leavitt alleged that Khalil had played a role in organizing demonstrations at which fliers were handed out bearing a logo for Hamas, which she did not display.

Mahmoud Kahlil, a Columbia University student who protested Israel’s war in Gaza, sued to block the turnover of disciplinary records to a U.S. House committee.

Mahmoud Khalil spoke with The Journal News in 2024 about his role in the Columbia University protests. Here's what he said.