Mahmoud Khalil, the Columbia University graduate student who was arrested and detained because of his pro-Palestinian activism, is scheduled to return to court next month in his battle with the Trump administration over his possible deportation. His case has become a test of President Donald Trump's pledge to combat antisemitism and deport noncitizen college activists who the Department of Homeland Security said “led activities aligned to Hamas, a designated terrorist organization.” U.S. District Judge Jesse Furman of the Southern District of New York ruled Wednesday that Khalil’s legal challenge to his detention should proceed in federal court in New Jersey,...