As hundreds of demonstrators rallied in New York City on Monday to demand the release of Mahmoud Khalil, a federal judge just steps away blocked the Palestinian activist and Columbia University graduate's removal from the United States. Judge Jesse M. Furman said Khalil is to remain in the U.S. "to preserve the court's jurisdiction" as the court weighs a filing challenging his arrest and planned deportation. A hearing was scheduled for Wednesday at federal court in New York City. Khalil attended Columbia University and helped organize protests last spring about the war between Israel and Hamas militants in Gaza. He...