An immigration judge in Louisiana has ruled that Columbia University graduate student Mahmoud Khalil can be deported as a national security risk. Khalil, who was part of an anti-Israel activist coalition at Columbia, was detained by federal immigration agents in March. The Trump administration's efforts to deport Khalil have been criticized by civil liberties groups and pro-Palestinian movements, who argue that it restricts free speech. Lawyers for Khalil are expected to appeal the ruling.