An investigator for the Interior Department’s Inspector General claims the White House hindered an investigation into a report on the BP oil spill by blocking access to a key official and email records, the New Orleans Times-Picayune is reporting. The investigator was trying to determine whether the White House intentionally edited the report to create the false impression that outside experts supported the administration's call for a moratorium on offshore drilling. The White House had said the editing was a mistake, and the Inspector General’s final report concluded it was. But the investigator, in a series of emails obtained by...