NEW YORK (Reuters) -A U.S. judge said on Wednesday that the Trump administration's bid to deport Columbia University student and pro-Palestinian activist Mahmoud Khalil is likely unconstitutional. U.S. District Judge Michael Farbiarz in Newark, New Jersey said he will issue a further order with next steps later on Wednesday. Khalil is currently in immigration detention in Louisiana. (Reporting by Luc Cohen in New York;Editing by Noeleen Walder)