One of Senator Dianne Feinstein's staffers in California was a spy who reported sensitive information to Chinese contacts.

Rating: Unproven

It is difficult to address the merits of this kind of argument based on what is publicly known about the case. The FBI has not commented on it, and according to Feinstein, no risk of the staff member in question’s transferring sensitive material ever existed, as no one on the senator’s California staff possessed security clearances necessary to have access to that kind of information in the first place.

While the reporting on this topic vaguely suggested that the staff member “reported back to China about local politics,” it is uncertain whether this staff member ever provided the Chinese anything of value, or even whether efforts to recruit this individual were even successful:

(http://www.autoadmit.com/thread.php?thread_id=4854289&forum_id=2#42607800)