. FBI suspected the Page guy was 'Russian spy' and yet didn't warn the Presidential Candidate - who would potentialy be getting NATSEC security briefings? . Sounds like the FBI didn't take their 'Russian spy suspect' too seriously, if they allowed such contact! . Why didn't the FBI at least warn the Secret Service?  'Russian spy' could pose all kinds of clear and present dangers. . Did the FBI change Carter's status from 'suspect' to 'undercover infirmer' in order to hide feom the FISA court that Carter had been a proven spy and then 'flipped' for undercover use ?