Federal watchdog finds unit called up records of congressional staff members, as well
                                
                                
                                    (Newser) -
                                    A special Customs and Border Protection unit used sensitive government databases intended to track terrorists to investigate as many as 20 US-based journalists, including a Pulitzer Prize-winning AP reporter, according to a federal watchdog. Yahoo News, which published an extensive report on the investigation, also found that the unit, the...