An appeals court panel ruled Thursday that a federal judge had no power to order the release of Mahmoud Khalil, the pro-Palestinian Columbia University graduate whom the Trump administration jailed for months.  The 2-1 decision by the U.S. Court of Appeals for the Third Circuit could lead to Khalil’s rearrest, though he is able to continue appealing.  Immigration authorities arrested Khalil, a student negotiator in pro-Palestinian...