PHOENIX — A federal judge has rejected arguments by the Department of Justice that she cannot intercede in a congressional bid to investigate how and why the agency first lied about the Operation Fast and Furious “gun walking’’ operation in Arizona. Judge Amy B. Jackson said federal courts are entitled to determine whether the Obama administration is wrongfully withholding documents from a House panel looking into the now-abandoned practice of letting illegally purchased weapons make their way to Mexico. That practice came to light when “walked’’ guns ended up at the scene where Border Patrol Agent Brian Terry was killed...